What will be the sex of the child born:
(a) if X chromosome carrying sperm fuses with an egg cell carrying X chromosome?
(b) if Y chromosome carrying sperm fertilizes an ovum containing X chromosome?
(a) If X chromosome carrying sperm fuses with an egg cell carrying X chromosome at fertilization, then the zygote will have XX chromosomes and develop into a female child.
(b) If Y chromosome carrying sperm fuses with an egg cell carrying X chromosome at fertilization, then the zygote will have XY chromosomes and develop into a male child.