How is the sex of a child determined in human beings? explain with the chart?
The sex of the child is determined genetically in humans.
Women have a perfect pair of sex chromosomes i.e. XX whereas men have a mismatched pair i.e. XY. All eggs produced will carry the X chromosome. Half of the sperms will carry Y chromosome and the other half will carry X chromosome.
During fertilisation, when the egg fuses with a sperm carrying Y chromosome, a boy will be formed On the other hand, when the egg fuses with a sperm carrying X chromosome, the offspring will be a girl child.
Parents XX (Female) XY(Male)
Gametes X X Y
|Y||XY (male)||XY (male)|