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
When our bodies make sperm and eggs, they don’t divide like the rest of the cells in our bodies. They split twice. A body cell has 2 chromosomes in a pair, they split once, so the new cell still has all of our genetic material in it. Splitting twice leaves half of our genetic material in each sperm/egg. Men have 2 different sex chromosomes called X and Y. Womens’ sex chromosomes are the same, called X and X.
In men, when our sex chromosomes split twice, this creates 4 sperm. 2 of them have an X chromosome, and 2 of them have a Y chromosome. When they meet up with the egg (which only has an X chromosome), the embryo has an equal chance of being XX (girl), or XY (boy) because half the sperm is Y and half are X.
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