Question

In a test cross involving $F_1$ dihybrid flies, more parental typo offspring were produced than recombinant type offspring. This indicates _______________.

• A. Both the characters are controlled by more than one gene
• B. The two genes are located on two different chromosomes
• C. Chromosomes failed to separate during meiosis
• D. The two genes are linked and present on the same chromosome.

Answer 1

The correct option is D The two genes are linked and present on the same chromosome.

When a cross is conducted between F₁ dihybrid flies with homozygous recessive parent fly, more parental type offspring were produced than recombinant type offspring. This indicates, that the two genes are linked and present on the same chromosome.

So, the correct option is ‘The two genes are linked and present on the same chromosome’.