Question

Which of the following have equal number of chromosomes?

• A. Klinefelter's syndrome and Down's syndrome
• B. Turner's syndrome and Down's syndrome
• C. Klinefelter's and Turner's syndrome
• D. Turner's syndrome and gynandromorph

Answer 1

Answer: (A)

Klinefelter syndrome and Down's syndrome are the genetic disorders that affect males and any respectively. Klinefelter syndrome occurs when a boy is born with one or more extra X chromosomes (XXY). So, number of chromosomes are 47 instead of 46. Down's syndrome is 21 trisomy. So, number of chromosomes are 47. Number of chromosomes in turner's syndrome are 45. A gynandromorph is an organism that contains both male and female characteristics with 46 chromosomes. Thus, the correct answer is option A.