A pedigree including a human disease that is inherited in a straightforward Mendelian manner, and in the third choice, the sickness is only autosomal dominant (full penetrance).
The pedigree helps explain how quickly genetic illnesses are passed down from one generation to the next because a parent can be either purebred dominant or heterozygous for the trait and produce both diseased and healthy kids. The pedigree in this instance is autosomal dominant. It cannot be recessive because not all of the children of parents III-8 and III-9 are recessive. The sole option where autosomal dominant inheritance (full penetrance) is present is the third one. As a result, the pedigree involves a human disease that is inherited in a straightforward Mendelian fashion. A human disease's Mendelian inheritance pattern in the lineage, and in the third scenario, the illness is solely autosomal dominant (full penetrance).
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to establish a link between a specific bacterium and a skin disease, researchers have shown that the bacterium was present in sick persons but not in healthy individuals. they isolated the bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick. what other experiment do researchers need to perform to be absolutely sure that the bacterium is responsible for the disease?
Answer:
Explanation:
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High levels Pfr triggers development of flower primordia in long day plants by promoting transcription of the gene CO. true or false?
It is True that high levels of Pfr trigger the development of the flowering complex in long-day plants by promoting transcription of the CO gene.
What does PFR do in plants?Pfr is the bioactive form of the protein. Red light exposure causes plant bioactivity and exposure to far-red light changes Pfr to inactive Pfr form, and phytochrome activity inhibited. These two forms together represent phytochrome system
How does PFR inhibit flowering?Pfr is the bioactive form of the protein. Exposure to red light leads to physical activity in plants. In general, experimental results conclude that PFR of phytochromes is required for long-term flowering of plants. Prevents short-day plants from flowering.
What do phytochromes do in short-day plants?In short-day plants, active phytochromes (Pfr) suppress flowering. During long periods of darkness (long nights), Pfr is converted to Pr. In the absence of Pfr, flowering is unrepressed and short-day plants flower.
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Dark moths began to outnumber white moths in cities after the Industrial Revolution. What is the most likely reason for this change?A)Light-colored moths began to turn black because of factory pollution.B)Light-colored moths were less favored for survival in the new environment.C)Light-colored moths mutated into dark colored moths.D)Light-colored moths began to die due to overpopulation.
The loss of lichens and rise in the abundance of dark-colored moths during England's industrialization were both caused by industrial melanism.
As a result of industrial pollution, the tree trunks darkened and developed soot and smoke deposits that made it impossible for lichens to grow on the tree bark. The white-winged moths were unable to bury themselves among the lichens as a result. As a result, there were more black moths because their predators had a harder time seeing them while doing so with the white-winged moths (due to a reduction in lichens). Natural selection led to the selection of dark species, whereas light ones perished.
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se the following information to answer the question(s) below. Giardia intestinalis can cause disease in several different mammalian species, including humans. Giardia organisms (G. intestinalis) that infect humans are similar morphologically to those that infect other mammals; thus they have been considered a single species. However, G. intestinalis has been divided into different subgroups based on their host and a few other characteristics. In 1999, a DNA sequence comparison study tested the hypothesis that these subgroups actually constitute different species. The following phylogenetic tree was constructed from the sequence comparison of rRNA from several subgroups of G. intestinalis and a few other morphologically distinct species of Giardia. The researchers concluded that the subgroups of Giardia are sufficiently different from one another genetically that they could be considered different species. According to the phylogenetic tree in the figure above, G. intestinalis constitutes a _____ group.
The evolutionary tree shown above shows that G. intestinalis belongs to a paraphyletic group.
How does a phylogenetic tree work and what does it mean?A phylogenetic tree depicts the relationship between several creatures by tracing the course of evolution from a shared ancestor to various descendants. The relationships between individuals within a population to the entire Earth's history of life can all be represented by trees.
What function does a phylogenetic tree serve?The use of phylogenetic trees to express theorized evolutionary relationships between enclosed groups of taxa (polyphyletic groups) that have been supported by similar characteristics known as increased presence is crucial for organizing knowledge about biodiversity.
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what percent of newborns experience adverse effects due to in utero alcohol exposure?
Answer:
Studies interviewing women just after birth have found that between 25 and 35 percent of newborns were exposed to alcohol in utero (Gauthier et al.
what’s the answer to this question?
RR is hom--ogenous red
Rr is heter---ogenous red
R is dominant
r is recessive
What is the Puneet square used for?A Punnett square is a graphical representation used in genetics to predict the probability of an offspring having a particular genotype (genetic makeup) based on the genotypes of the parents. The Punnett square is named after Reginald Punnett, the British geneticist who first described it.
The Punnett square is a simple and effective way to visualize the possible outcomes of a genetic cross between two individuals, where the columns represent one parent and the rows represent the other parent. The cells of the Punnett square contain the possible offspring genotypes that result from the combination of alleles (versions of a gene) from each parent.
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What is the most stable personality trait?
According to research, the most stable personality trait is "conscientiousness".
Conscientiousness is a personality trait characterized by being organized, dependable, and self-disciplined. People who score high on conscientiousness tend to be more responsible, reliable, and achievement-oriented. They are good at planning, setting goals, and following through with tasks.
Conscientiousness has been found to be a stable personality trait that remains relatively consistent throughout a person's life. This trait is related to success in various areas of life, such as career, academic achievement, and health outcomes.
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match the items. the task is to match the lettered items with the correct numbered items. appearing below is a list of lettered items. following that is a list of numbered items. each numbered item is followed by a drop-down. select the letter in the drop down that best matches the numbered item with the lettered alternatives. a. mitochondrial matrix b. oxygen c. mitochondrial inner membrane d. glycolysis e. 1 f. oxidative phosphorylation g. water h. cell membrane i. substrate-level phosphorylation j. 3 k. cytoplasm l. 4
Matching the items to the correct number list a. mitochondrial matrix b. oxygen c. mitochondrial inner membrane d. glycolysis e. 1 f. oxidative phosphorylation g. water h. cell membrane.
Substrate-level phosphorylation occurs in the cytoplasm of cells (glycolysis) and in the mitochondria (Krebs cycle). .
So. substrate level-mitochondrial inner membrane
Substrate-level phosphorylation is a metabolism reaction that results in the production of ATP or GTP by the transfer of a phosphate group from a substrate directly to ADP or GDP. Transferring from a higher energy (whether phosphate group attached or not) into a lower energy product.
The cytosol contains dissolved nutrients, helps break down waste products, and moves material around the cell. The nucleus often flows with the cytoplasm changing its shape as it moves. Cytosol is known as the matrix of the cytoplasm. It surrounds the cell organelles in eukaryotes.
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If an amino acid is not hydrogen bonding with another amino acid, what is it most likely hydrogen bonding with?.
If an amino acid is not hydrogen bonding with another amino acid, it is most likely hydrogen bonding with a solvent molecule, such as water.
Amino acids, as the building blocks of proteins, contain functional groups that can form hydrogen bonds with other functional groups. For example, the amino (-NH2) and carboxyl (-COOH) groups in amino acids can form hydrogen bonds with each other to create the peptide bond that links amino acids together in a protein. However, not all functional groups within an amino acid molecule will be involved in forming the peptide bond or hydrogen bonding with other amino acids. Some functional groups may interact with solvent molecules, such as water, which surround the amino acids in an aqueous environment. These interactions help to stabilize the protein structure and play a crucial role in the function of the protein.
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What did Rosalind Franklin contribute to the field of science and how did her work impact society?
Rosalind Franklin established that the molecule existed in a helical configuration and, more significantly, identified the density of DNA. Her efforts to improve the clarity of DNA molecule X-ray patterns.
What contribution did Rosalind Franklin make to science?Some would argue that Rosalind Franklin received unfair treatment despite having made a significant contribution to the understanding of the double helix structure of DNA. Brenda Maddox, a biographer, dubbed Franklin the "Dark Lady of DNA" because one of her employees once disparaged Franklin.
Rosalind Franklin, PhD, the brilliant and trailblazing scientist whose Photo 51 discovered the double helix of DNA, was honored with a dedication to our university in 2004. It is served as the basis for Francis Crick and James Watson's 1953 hypothesis that DNA is a double-helix polymer.
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if you were able to increase the kinetic energy of the molecuglucose is broken down through cellular respiration, which involves a large number of chemical reactions. at the end of the cellular respiration process, a large number of atp molecules are generated, yet not all of the possible energy that is contained in a molecule of glucose can be harnessed through these chemical reactions to generate atp. in other words, during cellular respiration, not all of the energy that is contained in a molecule of glucose is converted into the energy stored in atp. the remaining energy is .les inside your body, how would this affect your body temperature?
If the remaining energy produced during cellular respiration is lost as heat in the body, it would increase the body temperature.
This is due to the fact that heat is a type of energy, and the body needs to get rid of excess heat in order to maintain a stable internal environment, a process known as homeostasis.
When energy is released during cellular respiration via chemical reactions, some of it is used to form ATP, while the rest is lost as heat. This heat is produced by the metabolic process and must be expelled from the body to prevent overheating. The body accomplishes this through a number of mechanisms, including sweating, breathing, and increasing blood flow to the skin in order to radiate heat.
If the rate of heat loss is insufficient to compensate for the heat generated by cellular respiration, the body temperature rises, resulting in hyperthermia. Sweating, fatigue, headache, dizziness, and, in severe cases, organ damage or failure can all result from this. To avoid overheating and maintain a healthy body temperature, the body must maintain a balance between energy production and heat dissipation.
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what ion enters a neuron causing depolarization of the cell membrane?
Depolarization is caused when positively charged sodium ions rush into a neuron with the opening of voltage-gated sodium channels.
When positively charged sodium ions (Na+) abruptly flood into an open voltage-gated sodium channel in a neuron, it results in the depolarization, also known as the rising phase. The membrane potential actually changes polarity when extra sodium pours in. The membrane develops a temporary positive value (+40 millivolts) during this polarity transition.
Slow sodium channel closure and voltage-gated potassium channel opening result in the repolarization, or falling phase. The membrane's sodium permeability consequently decreases to resting levels. Slow voltage-gated potassium channels open when sodium ion input decreases, allowing potassium ions to quickly exit the cell. The cell's specific negative membrane potential is restored by this expulsion.
Sodium channels reset during the hyperpolarization phase, during which certain potassium channels remain open. Before the potassium channels close, there is a period of enhanced potassium permeability, which leads to an excessive potassium efflux. A small dip that follows the surge indicates that this causes hyperpolarization.
Action potential spread is influenced by refractory periods rather than stimulus intensity. The absolute refractory period is the time from when sodium channels open until they start to reset. No matter how powerful the stimulation, the cell is unable to respond during this time.
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when mismatched blood is administered causing an abo incompatibility, how are the erythrocytes destroyed?
A baby with ABO compatibility is being watched for jaundice by the nurse in the newborn nursery.
When antibodies (IgG or IgM) are directed against extracellular matrix antigens and result in cellular death, tissue damage, or functional loss, this is referred to as a type II hypersensitivity reaction. Antibodies in type II hypersensitivity reactions kill cells. The best examples of this kind of reaction are blood-transfusion reactions, in which host antibodies bind with foreign antigens on incompatible transfused blood cells and cause these cells to perish. Jaundice caused by ABO incompatibility has a certain form. This condition may affect a mother with type O blood and an infant with an A, B, or AB blood type. During pregnancy, mothers may produce antibodies that are damaging to the baby's blood type.
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a twisted, double strand of nucleotide bases and sugar phosphates is the structure of: group of answer choices mrna dna a protein rna
A twisted, double-stranded strand of nucleotide bases, and sugar phosphates is the structure of option B: DNA.
Nucleic acids, which are the information-carrying molecules of the cell, include DNA (deoxyribonucleic acid) molecules. As nucleotides are made up of numerous smaller molecules, DNA molecules are polymers. A phosphate group, a sugar molecule, and a nitrogenous base are all components of each nucleotide.
The genetic code, or all the information necessary for an organism to function, is stored in DNA molecules, which are housed in the nucleus. Two DNA strands make up DNA molecules, which are then wound around one another to form the double helix, a spiral pattern. James Watson, Francis Crick, and Rosalind Franklin made the initial discovery of the double helix structure of DNA in 1953.
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which vessels serve as the blood reservoirs of the body?
this pattern of drainage usually develops on alternating bands of hard and soft strata are called: group of answer choices dendritic trellis radial annular
This pattern of drainage usually develops on alternatinv bands of hard and soft strata called option B: trellis.
A trellis pattern forms when a river's tributaries are connected at nearly right angles. The trellis pattern occurs where parallel-lying hard and soft rocks are present. The stream patterns within a drainage basin are influenced by the terrain's slope, the underlying rock structure, the local climate, and other factors. Radial, dendritic, trellis, and rectangular ones are among these patterns.
An annular pattern, commonly referred to as a "circular pattern," is created when the tributaries of the main downstream streams develop in a circular pattern. Such a pattern has grown over a mature, dissected dome mountain that is divided into bands of hard and soft rock beds that alternate.
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if a c3 plant and a c4 plant are placed together in a sealed box with sufficient moisture and a high level of illumination, the c4 plant thrives while the c3 plant sickens and dies. briefly explain.
C3 plant undergoes photo-respiration in the presence of enough moisture and light and thus dies.
When the two plants- C3 and C4- are enclosed in a box with sufficient moisture and a high level of illumination, there is a fixed amount of CO2 available for the plant to take it up and undergo photosynthesis. It uses us all the CO2 available in the box and produces oxygen.
Increased levels of oxygen in the box activates the enzyme, Rubisco, of the C3 plant. This enzyme now oxygenates or fixes oxygen to RuBP instead of CO2. This process is called photorespiration which costs the energy of the plant. Thus, the plant dies of the low CO2 availability.
C4 plants have another enzyme, known as PEP, which helps them to avoid photorespiration. While, C3 plants lack this structure. Hence, C4 plants survive longer in an enclosed vessel than a C4 plant.
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in the following figure, bacterial cells are stained with a purple dye and appear as rods. a gelatinous layer (x) surrounds each bacterial cell and appears white in color in this picture. what is the name given to x?
A gelatinous layer (x) surrounds each bacterial cell and appears white in color in this picture, this is called a capsule.
Bacteria are prokaryotes, which are cells without clearly defined nuclei and organelles that are bound to membranes. Their chromosomes are made up of a single closed DNA circle. From tiny spheres, cylinders, and spiral threads to flagellated rods and filamentous chains, they appear in a variety of sizes and shapes.
A sizable structure shared by many bacteria is the capsule. It is a polysaccharide layer that is present outside of the cell envelope and is therefore included in the bacterial cell's outer envelope. It is a well-organized covering that is difficult to wash off and can lead to a number of ailments.
The capsule refers to the gelatinous covering that surrounds the bacterial species' outer layer.
The two main components of the bacterial plasma membrane are protein and phospholipid.
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define why would a pea plant that is heterozygous for the tallness trait have the dominant phenotype?phenotype.
The pea plant that is heterozygous for the tallness trait has the dominant phenotype because the homozygous and heterozygous forms of the disease express the dominant characteristic.
In genetics, a dominant allele is denoted by a capital letter, and a recessive allele is denoted by a smaller letter. Both homozygous dominant (TT) and heterozygous dominant conditions might result in the dominant trait manifesting (Tt).
As the tall phenotype predominates over the dwarf phenotype, let T stand for the tall allele and t for the dwarf allele. Tall pea plants with the genotype TT are homozygous, while those with the genotype Tt are heterozygous. Two tall pea plants that are homozygous (TT) and two tall pea plants that are heterozygous will result from a cross between them (Tt). They won't have any children that are dwarf-sized. Hence, it is impossible to conceive a small child.
So, despite the fact that the gene only contains one dominant allele, the dominant allele has the capacity to mask or suppress the phenotypic expression of the recessive trait. Hence, tall heterozygous pea plants display the dominant trait.
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2/2/2018Suppose the stereocilia of one hair cellbecome permanently bent. What willmost likely happen as a consequence?Why only a single pitchand not many pitches?A.A single pitch will be constantly perceivedB.A single pitch will no longer be perceivableC.A or B depending on the hair cell’s locationD.A or B depending on the bending’s direction
If the stereocilia of one hair cell become permanently bent, the most likely consequence is that a single pitch will no longer be perceivable.
This is because each hair cell in the inner ear is responsible for detecting a specific frequency or pitch of sound. If the stereocilia on a hair cell are damaged or bent, the hair cell may no longer be able to respond to the particular frequency it was responsible for, which can result in a loss of sensitivity to that frequency.
The reason why only a single pitch is affected is because hair cells are arranged in a tonotopic map, meaning that they are organized based on their preferred frequency. This means that hair cells that respond to higher frequencies are located at one end of the cochlea, while hair cells that respond to lower frequencies are located at the other end. Therefore, if the stereocilia on a hair cell at a particular location are damaged, it will only affect the perception of the frequency corresponding to that particular location in the cochlea.
Overall, the loss of sensitivity to a single pitch is a common consequence of hair cell damage or loss, which can occur due to a variety of factors such as aging, noise exposure, or certain medical conditions.
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the wetness of your earwax is a gene/trait controlled by which chromosome?
The ABCC11 gene variant in your DNA controls whether you have moist or dry earwax. The GA and GG genotypes are associated with moist earwax, whereas those with the AA genotype have dry earwax.
What determines whether you inherit dry or wet earwax from your parents?They subsequently discovered that whether a person has moist or dry earwax is determined by the switch of a single DNA unit in the gene. The gene's function appears to be to export chemicals from the cells that make earwax. The one DNA mutation renders the gene inactive, and without its involvement, a person has dry earwax.East Asians frequently have dry earwax while other populations typically have wet earwax.For more information on earwax kindly visit to
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in what way do megasporangia differ from microsporangia?
In contrast to microsporangia, which generate spores that grow into male gametophytes, megasporangia reproduce asexually that become female gametophytes.
What in biology is a megasporangium?Plants' female reproductive system includes the megasporangium. It might also be referred to as an ovule. It is made up of an integument and a nucellus. After maturation, the ovule might change in size and form.
What is the popular name for Megasporangia?- The megasporangium, sometimes referred to as the ovule, is a tiny structure that is joined to the placenta by a stalk called a funicle. A area known as the hilum is where the ovule's body and funcle connect. .
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which molecule did carl woese study to produce his tree of life?
Carl Woese developed his tree of life by studying ribosomal RNA (rRNA) molecules.
Bacteria, Archaea, and Eukaryota were the three different domains that this tree was the first to separate all known lifeforms into. This tree of life was groundbreaking because it revealed the limitations of the conventional two-kingdom categorization system, which divided all living creatures into either plants or animals.
The basis for this new categorization scheme was Woese's work with rRNA molecules. All living cells contain rRNA molecules, which may be used to assess how different and similar different species are.
This approach was used by Woese to identify the relationships between species and their positions in the evolutionary tree.
By analysing the sequence of bases in rRNA molecules from various species, he was able to estimate the degree of relatedness between them and so classify them into three separate domains.
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what the type of allele that is only seen in the homozygous state
Recessive alleles, also known as homozygous alleles, only manifest their effects in individuals who have two copies of the allele.
The allele for blue eyes, for instance, is recessive; as a result, two copies of the 'blue eye' allele are required to have blue eyes.
The word allele refers to various gene versions. According to the traits they are linked to, alleles are classified as dominant or recessive.
Only a homozygous state in an organism allows a recessive allele to express itself. Both the homozygous and heterozygous forms of a dominant allele can express themselves.
In terms of genetics, being homozygous means having inherited the same alleles (versions) of a genomic marker from both biological parents. A person who has two identical copies of a genomic marker is said to be homozygous for that marker. In contrast, a person who has two copies of a particular marker is said to be heterozygous.
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it turns out that, even after taking into account the actual gc content of human dna (~42%), the frequency of cpg in human dna is much lower than predicted by the calculation in part (b). explain why this might be the case.
the actual frequency of CpG dinucleotides in human DNA is much lower than predicted by the calculation in part (b) due to the evolutionary pressure to suppress CpG dinucleotides and limit their potential mutagenic effects.
The lower frequency of CpG in human DNA than predicted by the calculation in part (b) can be attributed to a process known as CpG suppression or CpG depletion. CpG suppression refers to the phenomenon where the frequency of CpG dinucleotides is much lower than expected based on the individual frequencies of C and G nucleotides in a genome. This is because CpG dinucleotides are particularly vulnerable to a type of DNA modification known as methylation, where a methyl group is added to the C nucleotide in the CpG dinucleotide. Methylation of CpG dinucleotides is a common epigenetic modification that can regulate gene expression and other cellular processes. However, over time, methylated CpG dinucleotides are prone to spontaneously deaminate, where the C nucleotide is converted to a T nucleotide. This results in a permanent mutation and a loss of the CpG dinucleotide.
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.
How do you solve the transcribe lexicon in Skyrim?
The Transcribe Lexicon puzzle is a quest objective in the game "The Elder Scrolls V: Skyrim", which involves solving a puzzle to transcribe the contents of a Dwemer lexicon.
Here are the steps to solve the puzzle:
Obtain the Blank Lexicon: The quest "Unfathomable Depths" will lead you to a Dwarven ruin called Avanchnzel, where you will find a quest item called the Blank Lexicon. Retrieve it and proceed with the quest.Find the Lexicon Receptacle: After completing the "Unfathomable Depths" quest, you will be given the "Discerning the Transmundane" quest. Follow the quest marker to reach the Tower of Mzark, which is located in the Blackreach region. Inside the tower, you will find the Lexicon Receptacle, which is a large Dwemer machine.Place the Blank Lexicon in the Receptacle: Activate the Lexicon Receptacle and place the Blank Lexicon in the slot provided.Solve the Puzzle: The puzzle consists of two parts: first, you need to rotate the outer ring of the lexicon to match the sequence of glowing patterns on the receptacle. To do this, interact with the lever on the right side of the receptacle, which will rotate the outer ring. Keep rotating it until the sequence on the outer ring matches the one on the receptacle.To learn more about Transcribe Lexicon refer to this link
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CCC Analyze Proportional Relationships In
each species, compare the upper arm to lower arm,
or compare fingers to metacarpals. Can you find any
equivalent ratios?
Answer:
In order to find equivalent ratios, we would need to measure the length of the various bones in each species and then divide the length of one bone by the length of another bone. This will give us the ratio of the two bones, and if this ratio is the same in different species, it would indicate a proportional relationship.
Explanation:
For example, if in species A, the length of the upper arm is 8 inches and the length of the lower arm is 10 inches, the ratio of the upper arm to the lower arm would be 8/10 = 4/5. If in species B, the length of the upper arm is 12 inches and the length of the lower arm is 15 inches, the ratio of the upper arm to the lower arm would be 12/15 = 4/5. Since both species have the same ratio, we can conclude that the upper arm and lower arm are proportional in both species.
Similarly, you could compare the length of the fingers to the length of the metacarpals to find if there is a proportional relationship in different species.
Imagine you are a genetic counselor and a couple has come to you to learn more about their genetics and the effects genetic inheritance will have on their baby. Describe which traits are inherited from parents and an explanation of how they are received from genes. What are common dominant traits in a family? Feel free to use your own family traits if you’d like!
As a genetic counselor, I can help the couple understand which traits their baby might inherit from them. Traits are inherited from parents through genes, which are the basic unit of heredity.
what are Some common dominant traits that can be inherited from parents ?
Widows Peak: This is a hairline that forms a V shape in the center of the forehead.
Cleft chin: This is a distinctive dimple in the center of the chin.
Freckles: These are small brown spots on the skin.
Dimples: These are small indentations on the cheeks or chin.
Bent little finger: This is a finger that curves inward towards the ring finger.
When both parents have the same dominant trait, their child is more likely to inherit that trait. However, if both parents have different dominant traits, the child has a 50% chance of inheriting each trait.
It's important to note that many traits are determined by multiple genes, and inheritance can be complex. As a genetic counselor, I can help the couple understand their genetic risks and provide guidance on how to best plan for the health of their baby.
As a genetic counselor, I can help the couple understand which traits their baby might inherit from them. Traits are inherited from parents through genes, which are the basic unit of heredity. Each person inherits two copies of most genes, one from each parent. Some genes are dominant, meaning that only one copy is needed to express the trait, while others are recessive, requiring two copies to express the trait.
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or sensory neurons are those that convey information from receptors in the periphery of the body to the brain and spinal cord.
Afferent as well as sensory neurons are the ones that transmit data to the spinal cord and brain from receptors on the body's periphery.
The spinal cord is where information processing starts after afferent neurons inside the dorsal roots convey impulses from of the body's sense receptors. Efferent motor neurons, that regulate the body's periphery, are found in the ventral horns. Efferent neurons transmit motor information out from the central nervous system to a muscles or glands of the body, whereas afferent neurons transport information from sensory receptors of a skin as well as other organs to a central nervous system. Efferent neurons, also referred to as motor neurons, transmit information from the central nervous system (CNS) to muscles as well as other peripheral systems like organs and glands.
(X or sensory neurons are those that convey information from receptors in the periphery of the body to the brain and spinal cord?)
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all members of the sarcodina phylum resemble the amoeba in that they have no difinite shape true or false
True. A subclass of the taxonomic phylum Sarcomastigophora. It includes the organisms known for their ability to move through cytosolic flow or by pseudopods, such as amoebas, heliozoans, rediozoa, and foraminifera.
Rhizopods and actinopods are classified as Sarcodina, or sarcodines. This group of protozoans develop pseudopodia for the majority of their life span. Only at the beginning of there own life cycle may flagella be present. Sarcodines are members of the family Amoeba (see amoeba) as well as pathogenic species, such as the Entamoeba histolytica that causes dysentery. The pellicle (or envelope), which is typically thin and flexible, can be circular or irregular in shape in these protozoans' cells. There may occasionally be an external shell or skeleton (see foraminiferan) (see radiolarian). More than one nucleus may be present in the cytoplasm, which is made up of ectoplasm and endoplasm. Food that sticks to the skin of the body or gets caught in pseudopodia is absorbed in food vacuoles.
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