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Question

The knowledge of cross-over percentage is of importance to scientists as it

A
Proves that genes are the DNA in chromosomes
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B
Makes possible the mapping of chromosomes
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C
Enables certain gene frequencies to increase in a population
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D
Neutralizes the effect of linkage
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Solution

The correct option is B Makes possible the mapping of chromosomes
  • Crossing over is the process by which homologous chromosomes exchange portions of their sequence. It is important because it is a source of genetic variation.
  • Hence the knowledge of cross-over percentage is of importance to scientists as it makes possible the mapping of chromosomes.
  • So, the correct answer is 'Makes possible the mapping of chromosomes'.

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