The probability of a cross-over occurring between two gene loci is proportional to

The activity of the two loci

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The distance between the two loci

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How far the loci are from the centromere

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How tightly the chromosomes are packed in the nucleus

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Solution

The correct option is C The distance between the two loci
The distance between genes or a gene and a centromere affects crossover frequencies because curing crossover, certain lengths of the chromosome are transferred. If two genes are far apart from each other are less likely to be transferred together during crossover.

So, the correct answer is 'The distance between the two loci'.

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