Two different genes control the expression of coat colour in an organism.

3. Two different genes control the expression of coat colour in an organism. The allele B produces a black coat colour and the allele G produces a gray-striped coat. The gene B influences the expression of gene G. The gray-stripped coat pattern appears only when gene B is homozygous recessive. An albino (coat colour lacking) occurs when both genes are homozygous.
A pure-breeding black coated organism was mated with an albino organism; all offspring had black coats.
The genotypes of the parents of these F1 offspring could be
a) BbGG x bbgg
b) bbGG x BBgg
c) Bbgg x bbGG
d) BBGG x bbgg

Post Merge: 8 years ago

I assume A cause it fits the criteria of the phenotype... and using a punnet square it could create both black and gray but do we just assume its creating all black?