When a dihybrid black straight-winged fly is crossed with a double-recessive brown curly-winged fly, the frequency at which black curly-winged and brown straight-winged flies are seen in the progeny is called the _______ frequency.(Note: The two genes are linked.)
A) mutation
B) mitotic
C) meiotic
D) allele
E) recombinant

Question

Quizplus · Accepted Answer

The frequency at which black curly-winged and brown straight-winged flies are seen in the progeny is called recombinant frequency. This is because the two genes are linked, meaning they are located close together on the same chromosome and are therefore more likely to be inherited together rather than independently. Recombination events, where the genes are separated during meiosis, can occur but are less common when genes are linked. Therefore, the frequency of recombinant offspring is lower than the frequency of offspring with the parental combinations (black straight-winged and brown curly-winged) in this dihybrid cross.

When a Dihybrid Black Straight-Winged Fly Is Crossed with a Double-Recessive