Which of the following reduces the chance of recombination and variation?
Correct answer: D. Gene linkage
- A. Genetic recombination
- B. Mutation
- C. Meiosis
- D. Gene linkage
Explanation
Gene linkage is the tendency of DNA sequences that are close together on a chromosome to be inherited together during the meiosis phase of sexual reproduction. Linked genes are found on the same chromosome and are inherited together. Since they don't independently assort, the gametes produced show less genetic variation than unlinked genes. Genetic recombination, meiosis, and mutation all increase the chances of variation.
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About Gene Linkage and Crossing Over
Linked genes lie on the same chromosome and tend to pass together, unlike genes that assort independently on different chromosomes. The topic connects linkage with homologous pairing, crossing over during prophase I of meiosis, recombinant and parental offspring, and recombination frequency as an estimate of gene distance.
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