Question

I am very nearsighted, and my wife is only partially nearsighted. Suppose different levels of nearsightedness are caused by a single allele of the “sight gene” that is incompletely dominant over the allele for normal sight. If I was homozygous for the nearsightedness allele and my wife was heterozygous for the nearsightedness allele, what would you predict about our children’s vision?

A.On average, half would be as nearsighted as me, and half would be as nearsighted as my wife

B.On average, half would be as nearsighted as me and half would have normal sight

C.On average, half would be as nearsighted as my wife and half would have normal sight

D.They would all have normal sight

E.They would all be as nearsighted as my wife

Answer 1

Answer : A.On average, half would be as nearsighted as me, and half would be as nearsighted as my wife.

Explanation :