Answer:
Somatic cells contain 2n chromosomes, during gamete formation meiosis takes place and the number of chromosomes get reduced to half, represented by n. This is for the reason meiosis is also known as reduction division. The genotype of human is 22pairs+XY or 44+XY for male
22pairs+XX or 44+XX for female
This means 22 pairs are autosomes and the last pair is of sex chromosome. During gamete formation meiosis occurs and sperms contain either 22+X or 22+Y chromosomes whereas ovum contains 22+X chromosomes.
When the two gametes fuse they again form the genotype to be 44+XX or 44+XY maintaining the genetic composition of the individual to its original.
Step-by-step explanation: