Question

When does meiotic recombination begin?

Answer 1

Meiotic recombination:

1. Meiotic recombination occurs in pachytene stage where non-sister chromatids of the homologous chromosomes cross-over & exchange of genetic material takes place.
2. Meiosis is started with a diploid cell which contains 2 copies of each of the chromosomes known as homologues.
3. The cell first undergoes tge DNA replication, hence each homologue consists of 2 identical sister chromatids.
4. After this, each set of the homologues starts to pair up with one other & then interchange genetic information by homologous recombination which usually leads to crossovers between homologues.
5. These are the sites where crossing over takes place b/w non-sister chromatids of the homologous chromosomes.
6. Prophase I of meiosis I is the unique phase which involves the recombination of genetic material b/w homologous chromosomes.
7. Recombination nodules are place at which the non-sister chromatids crossover.