The bicoid mutation (bcd^-) in fruit flies is inherited as a maternal effect recessive allele. What is the expected ratio of phenotypes in the offspring of a cross between a bcd⁺/bcd^- female and a bcd⁺/bcd^- male? A) 1 normal : 1 mutant B) 3 normal : 1 mutant C) 3 mutant : 1 normal D) all normal E) all mutant

Question

Quizplus · Accepted Answer

The bicoid mutation is a maternal effect gene, meaning the phenotype of the offspring is determined by the genotype of the mother. Since the mother is bcd⁺/bcd^-, she has at least one normal allele, so all offspring will be normal regardless of the father's genotype.

The Bicoid Mutation (Bcd-) in Fruit Flies Is Inherited as a Maternal

The Bicoid Mutation (Bcd^-) in Fruit Flies Is Inherited as a Maternal