What is recombination?

What is recombination?

• A. The process of replication.
• B. The mutation rate increase.
• C. The separation of homologous chromosomes.
• D. The new combination of genes due to crossing over.

Answer: (D)

Recombination is the creation of new combinations of alleles by exchanging genetic material between homologous chromosomes during meiosis. Specifically, crossing over during prophase I swaps segments between non-sister chromatids of paired homologues, producing recombinant chromatids that carry a mix of parental alleles. This reshuffling increases genetic diversity in gametes and offspring. It’s different from replication, which simply duplicates the genome, and from mutation, which introduces new variants rather than rearranging existing ones. It’s also distinct from the separation of homologous chromosomes (segregation), which distributes whole chromosomes without reshuffling alleles.

Recombination is the creation of new combinations of alleles by exchanging genetic material between homologous chromosomes during meiosis. Specifically, crossing over during prophase I swaps segments between non-sister chromatids of paired homologues, producing recombinant chromatids that carry a mix of parental alleles. This reshuffling increases genetic diversity in gametes and offspring. It’s different from replication, which simply duplicates the genome, and from mutation, which introduces new variants rather than rearranging existing ones. It’s also distinct from the separation of homologous chromosomes (segregation), which distributes whole chromosomes without reshuffling alleles.