Is there any inherent reason why the body becomes female unless “told” by the Y-chromosome to be male as opposed to the other way around?
In: Biology
There is no such thing as defaulting to female during fetal development. When sperm are produced during meiosis, they contain either an X chromosome or a Y chromosome. If a sperm carrying an X chromosome fertilizes an egg, the baby is female. If a sperm carrying a Y chromosome fertilized an egg, the baby is male.
A study conducted in 2017 found that the idea that embryos “default” to female was completely false.
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