Crossing over is more likely to separate genes on a chromosome if they are

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BlackTom AI · Accepted Answer

The question asks about when crossing over is more likely to separate two genes on a chromosome.
In general, recombination frequency increases with the physical distance between genes along a chromosome: the farther apart two genes are, the more likely a crossover event will occur between them during meiosis, leading to them being separated into different chromatids.
When genes are close together, a crossover between them is less likely, so they tend to be inherited together. This is why linkage decreases with distance and crossing over can disrupt linkage more readily for distant gene pairs.
A potential pitfall to watch for is that if genes are far apart enough, or reside on different chromosomes, recombination between them is effectively unlinked, often approaching a 50% recombination rate. However, among genes on the same chromosome, distance remains the key factor: the greater the distance, the higher the chance that a crossover will separate them.
Note: in this item, the only provided option identifies that the separation likelihood increases as genes are farther apart, which aligns with the standard understanding of genetic recombination mechanisms.

Biol-100-OLH-OMH-ONH Start Timed Exam #2

Crossing over is more likely to separate genes on a chromosome if they are

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