what is the relationship between the degree of crossing over and the distance between two genes?

The degree (frequency) of crossing over between two genes is directly proportional to the distance between them on a chromosome.

Quick Scoop

• When two genes are far apart , there is a higher chance that a crossover will occur between them during meiosis, so the degree of crossing over (recombination frequency) is high.

• When two genes are very close together , a crossover is less likely to fall between them, so the degree of crossing over is low.

• In classical gene mapping, this relationship is treated as roughly linear:
  • Higher recombination frequency ⇒ genes are farther apart.
  • Lower recombination frequency ⇒ genes are closer together.

In simple MCQ form, the correct statement is:

It is direct : as the distance between two genes increases , the frequency (degree) of crossing over between them increases.

So, more distance → more crossing over; less distance → less crossing over.

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Learn what is the relationship between the degree of crossing over and the distance between two genes? In genetics, recombination frequency rises as genes are farther apart on a chromosome.

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