Q. Consider the following statements:
1.Down’s syndrome results in the gain of extra copy of chromosome 21.
2.Turner’s syndrome results due to loss of an X chromosome in human females.
Which of the statements given above is/are correct?
Answer: C
Notes:
Explanation: Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome(s), called aneuploidy.
- For example, Down’s syndrome results in the gain of extra copy of chromosome 21.
- Similarly, Turner’s syndrome results due to loss of an X chromosome in human females.
Source: Science NCERT
