Question

If two genes show a recombination frequency of 1.3%, which of the following statements is most accurate?

Options

• The genes are tightly linked

• The genes are loosely linked

• The genes are on different chromosomes

• The genes assort independently

Answer 1

A recombination frequency of 1.3% indicates tightly linked genes because very little crossing over occurs between them. Morgan's work showed that the white and yellow genes in Drosophila exhibited 1.3% recombination, indicating they are located very close together on the same chromosome. Higher recombination frequencies indicate loosely linked genes.