Sometimes, lifelong truths suddenly become lies. So far we have learned that the characteristics of men focused on the Y chromosome and the characteristics of women on the X chromosome.
However, according to the results of the rat experiment conducted by scientists from Massachusetts and Maryland, almost half of the genes involved in the first steps of sperm production are found in female X chromosomes. Therefore, infertility from low sperm production may be a disease that the mother has passed to her child.