Crossing over occurs at the beginning of meiosis. Which of the following stateme

Question

Crossing over occurs at the beginning of meiosis. Which of the following statements is true about crossing over?

a. Crossing over does not produce chromosomes with new combinations of maternal and paternal alleles.

b. Crossing over involves the exchange of corresponding segments of DNA between sister chromatids.

c. Crossing over occurs both during mitosis and meiosis.

d. Crossing over is a rare event and can only occur at one location along each pair of homologous chromosomes.

e. As a result of crossing over, the two sister chromatids of a replicated chromosome are no longer identical.

Explanation / Answer

Ans:- e. As a result of crossing over, the two sister chromatids of a replicated chromosome are no longer identical.

explanation:- Crossing over involves the exchange of genetic material b/w two non-sister chromatids. As a result, the two sister chromatids of same chromosome are no longer identical.

As a result of crossing over, new combinations of alleles are formed so, (a) option is incorrect.

The correct option is (e).  

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.