True. The gender of the child depends on whether the sperm from the father carries an X or a Y chromosome.
- A woman has 44 + XX chromosomes, so every oocyte she produces carries 22 + X.
- A man has 44 + XY, so meiosis produces two kinds of sperms in equal numbers: 22 + X and 22 + Y.
- If a 22 + X sperm fertilizes the oocyte, the zygote is 44 + XX and a girl is born.
- If a 22 + Y sperm fertilizes the oocyte, the zygote is 44 + XY and a boy is born.
Since the mother always contributes an X chromosome, it is the father's sperm that decides the gender. Blaming the mother for the birth of a girl is therefore scientifically wrong, and practices like female foeticide must be stopped.