Question

Alleles of different genes that are on the same chromosome may occasionally be separated by a phenomenon known as

• A. Pleiotropy
• B. Epistasis
• C. Continuous variation
• D. Crossing over

Answer 1

The correct option is D Crossing over

Crossing over, process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. Crossing over occurs in the first division of meiosis. Morgan occasionally noticed that "linked" traits would separate. Meanwhile, other traits on the same chromosome showed little detectable linkage. Morgan considered the evidence and proposed that a process of crossing over, or recombination, might explain his results.