#1. You have two pure-bred dog strains of Labrador retriever:Yellow (BBee) and Brown (bbEE). You friend wants to have apure-bred puppy with black coat color. Let’s assume this set ofcoat color variations follows recessive epistasis with the allele‘ee’ masking B or b.
A) provide breeding schemes
B) after breeding experiments, provide a scheme of identifying thepure-bred one with black
color. Also, what is the frequency of the pure-bred one amongthe black puppies.
#2. In the rat, the gene for the pigment (P) is dominant to nopigment (p). The gene for black
(B) is dominant to the gene for cream (b). If a pigment gene (P)is absent, genes B and b are inoperative or non-functional,resulting in albino phenotype.
A) What kind of inheritance patterns is this? Provide a briefexplanation.
B) Provide the genotype and phenotype of the F1 of a cross betweenhomozygous black rat
and an albino homozygous for cream.
C) If you self-cross the F1 describe above, what kinds of ratwill you see in terms of genotype and phenotype?
