How does Nature balance both genders so well? They are almost 50/50

Question

Basically the Title. How are our body’s so good at regulating how much males and females are born, if they aren’t aware of the Balance at all?

In: Biology

Answer 1

Every normal body cell in a male mammal’s body has an X chromosome and a Y chromosome in it. Meiosis, the process that is used to create both eggs and sperm, first causes a cell to copy all its chromosomes (so it now has XXYY), and then divide twice. That results in two X sperm and two Y sperm. After sex, there’s a roughly 50/50 chance that an X-sperm gets to the egg first, rather than a Y-sperm.