Sex determination in Human

Sex determination in Human : In human male sex chromosome is XY, where in female sex chromosome is XX.

During gamete (sperm) formation in male half of the sperm contains X chromosome while other half contain Y chromosome. In female all gametes contain only one type of chromosome that is X.

Sex determination in Human

Thus when a male gamete i.e. sperm carrying X chromosome fertilize an ova, the zygote develope into female. When a sperm carrying Y chromosome fertilizes an egg, zygote develops into male.