State the importance of chromosomal difference between sperms and eggs of humans.

(N/A) In humans,the female produces eggs that always contain the $X$ sex chromosome. However,the male produces sperms that contain either an $X$ or a $Y$ sex chromosome.
This chromosomal difference is crucial for sex determination in the offspring.
When a sperm carrying an $X$ chromosome fertilizes an egg (which always has an $X$ chromosome),the resulting zygote has an $XX$ genotype,leading to the birth of a female child.
Conversely,when a sperm carrying a $Y$ chromosome fertilizes an egg,the resulting zygote has an $XY$ genotype,leading to the birth of a male child.
Thus,the sperm determines the sex of the child.