Describe crossing over and its significance.
Crossing over is a process of exchange of genetic materials between the non-sister chromatids of homologus chromosomes. It takes place in pachytene of prophase-I of meiosis.
It has following significances:
- It produces new combination of genes and trait.
- it increases variability of organisms.
- Due to crossing over, different varieties of plants and animals are produced.
- Crossing over helps in the identity of organism.
- It is a source of raw material for evolution of life.
- It increase immunity of...