A = functional enzyme, a = nonfunctional enzyme B = functional enzyme, b = nonfu

Question

A = functional enzyme, a = nonfunctional enzyme B = functional enzyme, b = nonfunctional enzyme AAbb individuals are crossed to aaBB individuals. The F1 cross with one another and the phenotypes of their progeny are scored as: 4 white mice 9: yellow mice: 3 red mice. The results indicate that the coloring produced by the precursor, intermediate and product are red, white, yellow respectively white, red, yellow respectively yellow, white, red respectively yellow, red white respectively none of the above

Explanation / Answer

E.The answer should be red,yellow and white.The expression of gene A has no effect on the expression of gene B. Interaction between gene A and B will lead to the variation of this ratio.

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