Having a hard time solving a biology problem. Can anyone help?

Posted on 2016-05-05 18:42:00 in Biology by MIZZLE

If a rooster with grey feathers is mated with a hen of the same phenotype. Among their offspring 15 chicks ARE GREY, 6 ARE BLACK, AND 8 ARE WHITE? 
A. What is the simplest explanation for the inheritance of these colors in chickens? 
a. complete dominance b. pleiotropy c. incomplete dominance d. aneuploidy e. codominance 
B. Explain why you picked your answer. 
C. What offspring would you expect from the mating of a grey rooster and a black hen? 
D. What offspring would you expect from the mating of a grey rooster and a grey hen?

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