Question 10
Chromosomes, DNA and Sex LinkageA married couple have 10 children and they are all girls. Which of the following is the CORRECT explanation?
- A.The woman is incapable of producing male children
- B.The man's sperms are very weak
- C.The man is not athletic enough
- D.The Y component of the man's sex chromosomes was always involved.
- E.The X component of the man's sex chromosomes was always involved.
Show the answer and explanation
Answer: E (The X component of the man's sex chromosomes was always involved.)
Explanation
The child's sex depends on the father's sperm; a girl results each time an X-carrying sperm fertilises the egg.