In humans, there is a `50%` probability of the birth of a boy and `50%` probability that a girl will be born. Justify the statement on the basis of the mechanism of sex-determination in human beings.

Explanation

In human beings, the genes inherited from our parents decide whether we will be boys or girls. Women have a perfect pair of sex chromosomes (XX). But, men have a mismatched pair (XY)
All children will inherit an X chromosome from their mother regardless
of whether they are boys or girls. Thus, the sex of the children will be
determined by what they inherit from their father. A child who inherits
an X chromosome from her father will be a girl, and one who inherits a
Y chromosome from him will be a boy.