Question

2) In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and the allele for white is W. The heterozygous phenotype is known as erminette.
a. What is the genotype for black chickens? _____________


b. What is the genotype for white chickens? ______________


c. What is the genotype for erminette chickens? ____________

Answer 1

A. BB because it is black and it is codominate. It is not BW because W is also shown with Black because both are codominate.( has to be homozygous)
b. WW (refer to a)
c. BW because both are shown (codominate )( has to be heterozygous)