Fur color in monkeys is under teh control of several genes. If all genes are nor

Question

Fur color in monkeys is under teh control of several genes. If all genes are normal with no mutations the fur color is brown. When a mutation occurs in the green gene (g); which functions to make red pigmeent, the fur results in a greenish color coat. When a mutation occurs in teh organge gene (o); which functions to make the blue pigment, the result is a orange color caot. When a mutation occurs in teh purple gene (p); function is to make yellow pigment, teh result is a purple coat. If a mutatino was to occur in two of the three genes teh resulting color would be red, blue or yellow because the two mutated genes would not produce there designaged pigment. A mutation in the white pigment gene would result in lost of the transporting of all pigments and the moneky would also be albino. If a homozygous green monkey is crossed with a homozygoud purple monkey what is the phenotypic ratio of the F2 generation?

Explanation / Answer

Homozygous green x Homozygous purple

ggoopp x ggoopp (bold letters are mutated)

F1: ggoopp

phenotype is brown because only one of the two alleles of g and p is mutated.

ggoopp x ggoopp

F2 :

ggoopp : brown color coat

ggoopp : White

ggoopp : brown color coat

ggoopp : green color coat

ggoopp : Purple color coat

Brown : Green : Purple : White

9 : 3 : 3 : 1

gop gop gop gop gop ggoopp ggoopp ggoopp ggoopp gop ggoopp ggoopp ggoopp ggoopp gop ggoopp ggoopp ggoopp ggoopp gop ggoopp ggoopp ggoopp ggoopp

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