Teach me how to approach and answer this question please! 3. (6 points) In mice, fur color is controlled by two genes that exhibit complete dominance. Gene Bencodes an enzyme that produces either brown or black pigment in the fur: brown fur color (B) isdominant to black fur color (b). A second gene has a recessive allele (a) that leads to an albino (all white)phenotype. Expression of the dominant allele (A) has no effect on the fur color phenotype.The Punnett square shows the results of crossing a brown mouse(BbAa) with a black mouse (bbAa).2a. What genetic phenomenon is this an example of?EPISTASISb. What is the expected phenotypic ratio of offspring from thiscross?1:2:21:113 BLACK:3 BROWN:Z ALBINO1 =Bbuubb AA1 =bauB6AA1 =2= BAAu2=bb A₂₁brown parent14 BA14 Bablack parent½ ba½ bABbAABbAa½ baBbAaBbaa1/4 bA bbAA bbAabbAa bbaa1:2:2

Mice's pigmentation is a complex trait regulated by multiple genes. In mice, eumelanin (black or brown) and phaeomelanin (yellow) are the two primary pigment types. The mouse's overall coat colour is determined by the quantity and distribution of these pigments.There are many different mouse coat colors, and each is determined by a unique combination of genes. Some of the most common coat colors include:Agouti mice have a banded pattern of black and brown fur. This is because the agouti gene causes the production of both eumelanin and phaeomelanin.Albino mice have no pigment in their fur, skin, or eyes. This is because they have two recessive alleles for the tyrosinase gene.Black mice have a high concentration of eumelanin in their fur. This is because they have two dominant alleles for the eumelanin gene.Brown mice have a moderate concentration of eumelanin in their fur. This is because they have one dominant and one recessive allele for the eumelanin gene.Pink-eyed dilute mice have a reduced amount of pigment in their fur and eyes. This is because they have two recessive alleles for the pink-eyed dilute gene.Yellow mice have a high concentration of phaeomelanin in their fur. This is because they have two dominant alleles for the phaeomelanin gene.The genetic phenomenon described in the question is likely an example of Epistasis.Genetically, this is known as epistasis, where the presence or absence of one gene (or allele) at one locus alters the effect of another gene (or allele). Accordingly, an organism's phenotype, or observable trait, is influenced by the interaction of its individual alleles rather than the sum of those alleles alone.There are two main types of epistasis:Dominant epistasis: When a dominant allele is present in one gene, the influence of that gene is entirely obscured. For instance, two genes—one for pigmentation and one for distribution—determine the coat color of Labrador retrievers. A black coat is the outcome of having a dominant pigmentation allele, independent of the distribution allele.Recessive epistasis: When two recessive alleles are present in a gene, the effect of one gene is only partially obscured. For instance, two genes—one for pigment production and the other for pigment transport—determine the color of the eyes in Burmese cats. Regardless of the allele for pigment production, the existence of two recessive alleles for pigment transport will result in blue eyes.The expected phenotypic ratio of offsprings from this cross is ------- 1:3 (Brown : Albino)All genotypes where a is present are express albino fur because of the a gene.a. The genetic phenomenon described in the question is likely an example of Epistasis.b. The expected phenotypic ratio of offsprings from this cross is ------- 1:3 (Brown : Albino)