Question

Is recombination and crossing over the same?

Answer 1

Recombination and crossing over:

1. Crossing over results in genetic recombination, or to put it another way, crossing over causes genetic recombination in the gametes.
2. At the pachytene stage of prophase 1 of meiosis I, the term "crossing over" refers to the exchange of genetic material between non-sister chromatids of homologous chromosomes.
3. The term "crossing over" describes the DNA exchange that takes place between paired homologous chromosomes (one from each parent) during the formation of egg and sperm cells (meiosis).
4. DNA fragments are broken and recombined during the recombination process to create novel allele combinations. The genetic variation that results from this recombination process at the gene level reflects variations in the DNA sequences of various species.
5. When homologous chromosomes align in pairs and exchange DNA segments during prophase I of meiosis, one of the most prominent instances of recombination occurs.