Linkage between genes
Correct answer: B. Decreases with distance
- A. Increases with distance on chromosome
- B. Decreases with distance
- C. Is unaffected by distance
- D. Only occurs on sex chromosomes
Explanation
Linkage decreases with distance; genes farther apart cross over more frequently. 1% recombination = 1 map unit.
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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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