How is sex determined in human beings?

Explanation

Determination of the sex of child. Sex chromosomes determine sex in human beings. In males, there are `44 + XY` chromosomes, whereas, in female there are `44 + XX` chromosomes. Here, X and Y chromosomes determine sex in the human beings.
Two types of gametes are formed in male, one type is having `50%`, X-chromosome, whereas the other type is having Y-chromosome. In female, gametes are of one type and contain X-chromosome. The females are homogametic. If male gamete having Y-chromosome (androsperm) undergoes fusion with female gamete having X-chromosome the zygote will have XY chromosomes and this gives rise to male child.
If the male gamete having X-chromosome undergoes fusion with female gamete having X-chromosome, the zygote will be having XX-chromosome and this gives rise to female child.