Question

During mitosis of a particular diploid cell, a single chromosome undergoes nondisjunction. What will be the chromosome number in the resulting daughter cells?

Multiple choice question.
2n + 1, 2n - 1
2n + 1, 2n
2n, 2n - 1
n + 1, n - 1
2n, n

Answer 1

After nondisjunction during mitosis, one daughter cell will have an extra chromosome (2n + 1), and the other will have one less (2n - 1), leading to aneuploidy.

Step-by-step explanation:

During mitosis of a particular diploid cell, if a single chromosome undergoes nondisjunction, it means that the chromosomes do not separate properly during cell division. Consequently, one daughter cell will end up with an extra chromosome (2n + 1), and the other with one less (2n - 1). This situation can lead to aneuploidy, which is the presence of an abnormal number of chromosomes in a cell, and may result in conditions such as Trisomy 21, also known as Down Syndrome. Therefore, the chromosome number in the resulting daughter cells after a nondisjunction event during mitosis would be 2n + 1 and 2n - 1.