Question

the statistic probability of getting a male or female child is 50%. explain

Answer 1

In woman XX Chromosomes are present.
and In Man XY chromosomes are present.

So, it is sure that woman will give X chromosome.
But man have two chromosomes X and Y 
so, He can give any one.

So, Probability is 50% becoz he can X and Y also.

Here is more detail

XY --- XX = XX,XY