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artaig t1_jdqexuh wrote

"Most likely"? It's the male who determines whether the offspring is male or female, or are you trying to say something else?


hpisbi t1_jdqk78v wrote

there are some other theories, including that Y chromosome sperm swim slightly faster than X chromosome sperm or that female embryos have a slightly higher chance of miscarrying. so they’re saying that the current view is that the ratio of X and Y sperm produced is what makes the difference, not the other theories.