Question

What is homologous recombination?

1) Usually results in crossovers
2) Often occurs during interphase
3) Can occur between any two random DNA sequences
4) A relatively rare event
5) Occurs only in reproductive cells

Answer 1

Homologous recombination is a process that occurs during meiosis, where DNA breakage and exchange of alleles between homologous chromosomes take place.

Step-by-step explanation:

Homologous recombination is a process that occurs during meiosis, specifically in the first cell division (Meiosis I). When homologous chromosomes align during synapsis, DNA breakage can occur, resulting in an exchange of alleles between the chromosomes. This exchange of genetic material is known as crossing-over or recombination. It leads to the creation of recombinant chromosomes, which contain a mix of alleles from the parental chromosomes.

Homologous recombination is not a rare event and is characterized by the occurrence of crossovers, where genetic material is swapped between non-sister chromatids of homologous chromosomes. It happens mainly during meiosis in reproductive cells and is responsible for increasing genetic diversity in species.