Suppose You Discovered a New Mutation in Mice That Causes

Multiple Choice

Suppose you discovered a new mutation in mice that causes a curved spine.You noticed that this mutant phenotype is present only in females.When curved-spine females are crossed with normal males, the progeny are always recovered in a 1:1:1 ratio of curved-spine females, normal females, and normal males.Explain the genetic basis for this ratio.

A) hemizygous or homozygous lethal autosomal allele
B) hemizygous or homozygous lethal sex-linked allele
C) recessive sex-linked allele
D) recessive autosomal allele
E) dominant sex-linked allele