During meiosis, the homologous chromosomes come together and form pairs, this process is called:
Correct answer: B. Synapsis
- A. Linkage
- B. Synapsis
- C. Pairing
- D. Crossing over
Explanation
During meiosis, homologous chromosomes come together and form pairs through a process called "synapsis." The synapsis involves the alignment of homologous chromosomes side by side, allowing for the exchange of genetic material between non-sister chromatids during "crossing over." This genetic recombination during crossing over plays a critical role in creating genetic diversity in the gametes, which is essential for sexual reproduction. The other options, "linkage" and "pairing," are not specific to the process of homologous chromosome pairing during meiosis.
This question appeared on the PMC National MDCAT 2020 paper, which you can sit online with every answer explained.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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