Question

How does crossing over between non-sister homologous chromatids produce different gene combinations?

Answer 1

Crossover:

1. It refers to the exchange of genetic content between the non-sister chromatids among homologous chromosomes.
2. This phenomenon occurs in the pachytene phase of prophase 1 during meiosis.
3. A region of one chromosome is exchanged with a region of another chromosome which produces a unique genetic content.
4. This process promotes genetic diversity in organisms.
5. Thus, this process of exchange of non-sister chromatids between different chromosomes creates unique, different genetic combinations.