Question

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

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

Answer 1

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'.