Coat color in rodents is known to be a trait resulting from gene interactions (gene modifier...

Coat color in rodents is known to be a trait resulting from gene interactions (gene modifier effect). The two genes involved are A and C. Allele C results in black pigmentation and is dominant to c (albino). Allele A results in the agouti phenotype if the rodent carries at least one dominant C allele. One albino rodent from unknown genotype mates an agouti rodent that is known to be homozygous dominant for both genes. The offspring resulting from that mating could be:

Select one:

a. Only albino

b. Only agouti

c. Only black

d. A combination of black, agouti and albino

e. Impossible to determine if the genotype of the albino rodent is unknown.

Solutions

Expert Solution

black pigmentation = CC

albino = cc

agauti = AC

the agauti is expressed only when both the dominanat allele [A and C] inherit together. this shows that A is complementarory factor of C to produce thye agauti phenotype . If AA or aa is present the with cc the trait may be albino. If the aa CC is a combination the trait is again found albino. If aaCC combination is there the trait is black pigmented .

One albino rodent from unknown genotype mates an agouti rodent that is known to be homozygous dominant for both genes.

answer :- as we see above , there are two chances of combination for albino-

aaCC
AAcc

the agauti rodent genotype = AACC

let us cross any one of the albino with agauti

PARENT 1. = aaCC x AACC

GAMETES = aC AC

result combination = AaCC [all agauti]

PARENT 2 = AAcc X AACC

GAMETES = Ac AC

result combination = AACc [all agauti]

so your answer will be option b- only agauti

gladiator answered 1 year ago

Next > < Previous

Related Solutions

1. In mice, one of the gene determining coat color is the A gene, which has...

1. In mice, one of the gene determining coat color is the A gene, which has multple alleles. two of these are an Allele for black hair (a) and allele for yellow hair (Ay) . (Ay) is completely dominant to a; however, for reasons that are unclear ( at least to me), AYAY mice always die before embroyic development is completed. a) two mice with yellow hair mate with each other. what are the genotype of the mice? b) for...

In Labrador retrievers, there are 3 gene products involved in determining coat color: gene product B, gene...

In Labrador retrievers, there are 3 gene products involved in determining coat color: gene product B, gene product E, and gene product C. B produces a melanin pigment such that B/B and B/b will produce a black lab while b/b (with less melanin produced) will result in a chocolate lab. However, for the B gene to be expressed, a signaling hormone (gene E product) must be produced to activate transcription of the B gene. E is fully dominant to e (loss of function mutation). In...

answer use a different color, please) 1. In shorthorn cattle the gene for red coat color...

answer use a different color, please) 1. In shorthorn cattle the gene for red coat color is not dominant over that for white coat color. The heterozygous condition produces a roan color. A breeder has a white, red, and roan cows and bulls. What phenotypes can be expected from the following crosses? A. Red x roan B. Red x red C.. Roan x white D. Red x white 2. A homozygous black chicken is crossed with a homozygous splashed white...

In a population of mice, coat color is controlled by a gene locus with two alleles,...

In a population of mice, coat color is controlled by a gene locus with two alleles, B and W. BB mice are brown, BW are tan and WW mice are white. What is this type of inheritance called? In this population there are 20 brown mice 15 tan mice and 30 white mice. Calculate p and q for this population where p = the allele frequency of B and q = the allele frequency of W.

Suppose that a particular gene that controls coat color in dogs is controlled by four alleles...

Suppose that a particular gene that controls coat color in dogs is controlled by four alleles in the population. These alleles are called cch (chinchilla dog), cd (white dog with dark eyes), cb (pale gray dog) and c (albino dog). The alleles are given from the most dominant to the most recessive. Let’s assume that a particular population of these dogs is in Hardy-Weinberg equilibrium. The allele frequencies for our four alleles are: cch = 0.37 cd = 0.23 cb...

In rats, gene B produces black coat color if the genotype is B-, but black pigment...

In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D-, but no pigment is produced when the genotype is dd. Production of both pigments results in brown coat color. If neither pigment is produced, coat color is cream. A third independently assorting gene involved in determination of coat color in rats is...

In rats, gene B produces black coat color if the genotype is B–, but black pigment...

In rats, gene B produces black coat color if the genotype is B–, but black pigment is not produced if the genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D–, but no pigment is produced when the genotype is dd. Production of both pigments results in brown coat color. If neither pigment is produced, coat color is cream. Determine the genotypes of parents of litters with the following phenotype distributions. Part A...

Cat coat color is controlled by an X-linked gene with two alleles: XB= Black and XO...

Cat coat color is controlled by an X-linked gene with two alleles: XB= Black and XO = Orange. A population of cats in Tampa was found to consist of the following phenotypes: Black Orange Calico Totals Males 311 42 0 353 Females 277 7 54 338 Calculate the allelic frequency using all of the available information.

Calico cats have two genes that govern their coat color. One gene codes for the white...

Calico cats have two genes that govern their coat color. One gene codes for the white undercoat and the other codes for the fur colors black and orange and this gene is X-linked. We will look at the gene for black and orange fur color only. In this situation, both black and orange are codominant, so that heterozygous individuals are a different phenotype. Based on this information, what would black, orange and calico female cats' genotypes be? What would be...

4. In humans, red-green color blindness is recessive to normal sight. The gene for this trait is...

4. In humans, red-green color blindness is recessive to normal sight. The gene for this trait is carried on the X chromosome. In each of the following, give the genotype and phenotype of all possible offspring and their expected ratios. Give the phenotypic ratios of males ♂ and females ♀ separately (ALWAYS FOR X-LINKAGE): (a) a color-blind man married to a normal- sighted woman whose father is color-blind; (b) a man with normal color vision married to a color-blind woman.

Subjects