The Father
The Mother
The Father's Father
Both A & B
Answer is Right!
Answer is Wrong!
The sex of a newborn baby is determined by the chromosome inherited from the father. The father’s sperm contains either an X or a Y chromosome, and the mother’s egg always contains an X chromosome. If the sperm that fertilizes the egg contains an X chromosome, the baby will be a girl. If the sperm that fertilizes the egg contains a Y chromosome, the baby will be a boy.
Option A is the correct answer. The father’s sperm determines the sex of the baby.
Option B is incorrect. The mother’s egg always contains an X chromosome.
Option C is incorrect. The father’s father does not have any direct influence on the sex of the baby.
Option D is incorrect. Only the father’s sperm determines the sex of the baby.