Question 39
Chromosomes, DNA and Sex LinkageThe probability of a baby being a boy or a girl depends on the contribution of the
- A.father's sex cell
- B.father's somatic chromosome
- C.mother's sex cell
- D.mother's X-chromosome.
Show the answer and explanation
Answer: A (father's sex cell)
Explanation
Every egg carries an X; the sperm carries either X (girl) or Y (boy), so the father's sex cell decides.