Crossing of a homozygous wild type with a mutant that is heterozygous for a dominant mutation will result in F₁ progeny of which
A)all show the mutant phenotype.
B)half show the wild-type phenotype and half show the mutant phenotype.
C)three-fourths show the wild-type phenotype and one-fourth show the mutant phenotype.
D)all show the wild-type phenotype.

Question

Quizplus · Accepted Answer

If the homozygous wild type (WW) is crossed with a mutant heterozygote (Ww), the resulting F₁ generation will have a genotype of Ww. Since the mutant allele is dominant, half of the F₁ individuals will show the mutant phenotype and the other half will show the wild-type phenotype.

Crossing of a Homozygous Wild Type with a Mutant That