If color blindness is an x-linked recessive trait, what genotype in a father and a mother would be predicted to produce a 1: 1 ratio of normal to color-blind offspring?

a.) unaffected father and unaffected (non-carrier) mother
b.) unaffected father and carrier mother
c.) affected father and carrier mother
d.) affected father and unaffected (non-carrier) mother

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4