Tell me please. In course of biology, I remember that a man has XY chromosomes, and a woman has only X. Accordingly, depending on which chromosome comes from Father(man) Y or X, a girl (XX) or a boy (XY) will be born.
the number of sperm with the X or Y chromosome is the same. Each sperm and each egg contains exactly half the chromosome of the parent, and further, they randomly meet and child is formed
Questions: What influences on what chromosome will come from Father? Is it possible to mathematically decide which chromosome will come from Father? Whether there are external and internal factors that affect on the meeting of the chromosomes of men (sperm) and women (egg) Is there any research on my questions? any information is valuable