Homework Answers
A locus and B locus are the two different gene loci that are responsible for determining the mouse coat color.
(a)
The phenotypes of the parents are - Yellow and albino.
The genotypes of the parents are - "
"
and "
".
The cross between the parents is shown below:
(b)
A cross between a black offspring and one yellow sibling is shown below:
Therefore, the genotype of the yellow parent is 
.
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19. Two different gene loci are responsible for determining mouse coat color. A recessive lethal allele...
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is...
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is involved in the distribution of pigment along the hair. A dominant allele (A) produces a hair color called "agouti"--the hair has dark pigment at the base and tip of each hair shaft and yellow pigment in the central portion of the shaft. Homozygous recessive mice (aa) are missing the yellow stripe and thus have solid dark-colored hair. Gene B is involved in the color...
1. At least 3 independently assorting loci are known to govern coat color in mice. The...
1. At least 3 independently assorting loci are known to govern coat color in mice. The genotype C- will allow pigment to be produced by 2 other genes. The cc genotype does not allow pigment production resulting in albino mice. The striped “agouti” hair pattern depends on the genotype A- and the aa genotype is nonagouti. Finally, the color of the pigment may be black (B-) or brown (bb). Five different coat colors may be produced by the action of...
In the agouti mouse, the gene for coat color is next to the gene which is...
In the agouti mouse, the gene for coat color is next to the gene which is vital for early mouse development. These two genes have individual promoters. The promoter drives a high level of gene expression, whereas the v promoter is less active, only producing a moderate amount of yellow pigment in wild-type mice. In the agouti mouse, the genes have individual pro active, only producing ar agouti gene for coat color is next to the v gene which is...
Vanilla mice! Someone please help. I am having a hard time with this material and want...
Vanilla mice! Someone please help. I am having a hard time with
this material and want to make sure that I am on the right track.
"Fur color in mice is under the control of (at least) three
unlinked loci...
Question 4: (4 points) Fur color in mice is under the control of at least) three unlinked loci. The C gene determines whether melanin is produced at all; the B gene influences the amount of melanin that is deposited in...
In rats, several independently assorting autosomal genes affect coat color. Gene A controls the distribution of...
In rats, several independently assorting autosomal genes affect coat color. Gene A controls the distribution of yellow pigment in hair, and gene B causes black pigmentation. The two genes interact as follows: A–B– (gray), A–bb (yellow), aaB– (black), and aabb (cream). These genotypes are only expressed in the presence of the dominant allele of a third gene, C; rats with genotype cc are albino. a. Deduce the genotype of each albino mice, to the extent that is possible, in the...
coat color is due to a dominant allele (W), black coat color to its recessive allele...
coat color is due to a dominant allele (W), black coat color to its recessive allele unnett squares for each of the following crosses and answer the questions. 2. In sheep, white tw). Construct P d frequency fo a. A black sheep crossed to a black sheep. List the genotypes, phenotypes, an each of the offspring b. A white sheep, the product of a black x white cross, is crossed with a black sheep. List the genotypes, phenotypes, and frequency...
In the same mouse species, a fourth unlinked gene (gene P/p) also affects fur color. For mice...
In the same mouse species, a fourth unlinked gene (gene P/p) also affects fur color.For mice that are either homozygous dominant (PP) or heterozygous (Pp), the organism’s fur color is dictated by the other three genes (A/a, B/b, and C/c).For mice that are homozygous recessive (pp), large patches of the organism’s fur are white. This condition is called piebaldism.In a cross between two mice that are heterozygous for agouti, black, color, and piebaldism, what is the probability that offspring will...
7. In mice the coat color called agouti results from a dominant allele A. Mice that...
7. In mice the coat color called agouti results from a dominant allele A. Mice that are AA or Aa have agouti fur. Mice that are aa have black fur. However to get any coat color at all, at least one copy of a second dominant allele C of a different locus must be present. If a mouse has genotype cc, the mouse is albino regardless of what is happening at the other gene pair. Suppose two mice with genotypes...
/ fn Labrador retrie brown coat color however, the E gene controls expression of the B...
/ fn Labrador retrie brown coat color however, the E gene controls expression of the B gene. The B and E genes interact to yield 3 phenotypes: black (B_E), chocolate (bbE) and yellow ee). What is the phenotypic ratio of the pups that might result vers, the B allele confers black coat color and the b allele from a cross between a yellow female (Bbeo and a chocolate male (hb Be) Coat color in Labrador retrievers is an example of...
2. In Labrador dogs, there are 2 loci that determine coat color. The first locus, B...
2. In Labrador dogs, there are 2 loci that determine coat color. The first locus, B is dominant to b. At least one B allele will produce black coat color, while the bb genotype produces a chocolate coat color. This first locus also determines nose color in Labradors: B_ black noses, and bb brown noses. The second locus has a genotype, ee, that is epistatic in nature. Any Labrador with an ee genotype will be yellow. A genotype containing at...
1. At least 3 independently assorting loci are known to govern coat color in mice. The genotype C- will allow pigment to be produced by 2 other genes. The cc genotype does not allow pigment production resulting in albino mice. The striped “agouti” hair pattern depends on the genotype A- and the aa genotype is nonagouti. Finally, the color of the pigment may be black (B-) or brown (bb). Five different coat colors may be produced by the action of...
In the agouti mouse, the gene for coat color is next to the gene which is vital for early mouse development. These two genes have individual promoters. The promoter drives a high level of gene expression, whereas the v promoter is less active, only producing a moderate amount of yellow pigment in wild-type mice. In the agouti mouse, the genes have individual pro active, only producing ar agouti gene for coat color is next to the v gene which is...
Vanilla mice! Someone please help. I am having a hard time with
this material and want to make sure that I am on the right track.
"Fur color in mice is under the control of (at least) three
unlinked loci...
Question 4: (4 points) Fur color in mice is under the control of at least) three unlinked loci. The C gene determines whether melanin is produced at all; the B gene influences the amount of melanin that is deposited in...
coat color is due to a dominant allele (W), black coat color to its recessive allele unnett squares for each of the following crosses and answer the questions. 2. In sheep, white tw). Construct P d frequency fo a. A black sheep crossed to a black sheep. List the genotypes, phenotypes, an each of the offspring b. A white sheep, the product of a black x white cross, is crossed with a black sheep. List the genotypes, phenotypes, and frequency...
7. In mice the coat color called agouti results from a dominant allele A. Mice that are AA or Aa have agouti fur. Mice that are aa have black fur. However to get any coat color at all, at least one copy of a second dominant allele C of a different locus must be present. If a mouse has genotype cc, the mouse is albino regardless of what is happening at the other gene pair. Suppose two mice with genotypes...
/ fn Labrador retrie brown coat color however, the E gene controls expression of the B gene. The B and E genes interact to yield 3 phenotypes: black (B_E), chocolate (bbE) and yellow ee). What is the phenotypic ratio of the pups that might result vers, the B allele confers black coat color and the b allele from a cross between a yellow female (Bbeo and a chocolate male (hb Be) Coat color in Labrador retrievers is an example of...
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