Question

Does crossing over induce variability?

Answer 1

Crossing over:

1. During meiosis, when genetic material is exchanged between non sister chromatids of homologous chromosomes, it is called crossing over.
2. Variability is brought about by crossing over.
3. It involves the exchange of an equal number of non-sister chromatids from two distinct but related chromosomes.
4. Four-stranded phases are where crossing over takes place.
5. The four chromatids do not participate in the process of crossing over.
6. The final two are referred to as non-crossovers.