Question 54
Chromosomes, DNA and Sex LinkageWhich of the following statements about sex determination is correct? At fertility
- A.the probability of male to female offspring is 1/2
- B.the Y chromosome of the father decreases the probability of having a male child to 3/4
- C.the xx chromosome of the mother decreases the probability of having a female child to 3/4
- D.the vigour of either parents determines the sex of the offspring
Show the answer and explanation
Answer: A (the probability of male to female offspring is 1/2)
Explanation
Half the father's sperm carry X and half carry Y, so each child has an equal (1/2) chance of being male or female.