Question

What happens in crossing over?

Answer 1

Crossing over: It is the process by which non-sister chromatids of homologous chromosomes exchange portions, resulting in recombination.

1. It occurs at the pachytene stage of prophase I of meiosis.
2. Crossing over occurs between these chromatids in the chiasma area.

Significance of crossing over:

1. Crossing over results in the development of a novel combination of genes.
2. It plays a vital function in the evolution process.
3. The frequency of crossing over aids in the creation of genetic maps.
4. It provides evidence for a chromosomal linear organization of related genes.