A testcross performed with F1 dihybrid flies results in more parental-type offspring than recombinant-type offspring. Which of the following statements best explains this result?
A) The two genes are linked on the same chromosome.
B) The two genes are linked but on different chromosomes.
C) Recombination did not occur in the cell during meiosis.
D) Both of the characters are controlled by more than one gene.

Question

Quizplus · Accepted Answer

The two genes being linked on the same chromosome means they are physically close to each other, reducing the likelihood of recombination during meiosis. This results in more parental-type offspring because the alleles for the two genes are inherited together more often than not.

A Testcross Performed with F1 Dihybrid Flies Results in More