question_answer

From a diploid condition of 2N, which condition can arise due to non-disjunction of chromosomes?

A)  3N             

B)  5N

C)  \[2N+1\]           

D)  N.

Correct Answer: A

Solution :

: Non-disjunction of chromosomes is the phenomenon of failure of the separation of the homologous chromosomes during meiosis I or the two sister chromatids of a chromosome during meiosis II. It leads to the change in the chromosome number.