You are studying body color in an African spider and have found that it is controlled by a single gene with four alleles: B (brown), b r (red), b g (green), and b y (yellow). B is dominant to all the other alleles, and b y is recessive to all the other alleles. The b g allele is dominant to b y but recessive to b r . You cross a pure-breeding brown spider with a pure-breeding green spider.
-Predict the phenotype of the progeny.
A) half brown, half green
B) three-fourths brown, one-fourth green
C) all brown
D) all green
E) all yellow

Question

You are studying body color in an African spider and have found that it is controlled by a single gene with four alleles: B (brown), b r (red), b g (green), and b y (yellow). B is dominant to all the other alleles, and b y is recessive to all the other alleles. The b g allele is dominant to b y but recessive to b r . You cross a pure-breeding brown spider with a pure-breeding green spider. 
-Predict the phenotype of the progeny.
A) half brown, half green
B) three-fourths brown, one-fourth green
C) all brown
D) all green
E) all yellow

Quizplus · Accepted Answer

The Answer is C

You Are Studying Body Color in an African Spider and Have