aka_gerbil
Rooting for the Underdogs
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I define it on sexual reproduction of our species: what gametes would one contribute to production of the next generation and the genitalia/organs one is born with as determined by composition of xx and xy chromosomes.But we’re still defining biological sex based on a collection of characteristics rather than a single characteristic, correct?
Most but not all people fall into one of two peaks on a bimodal graph with a small percentage between (intersex) or at the extremes. Some intersex people can reproduce, others can’t. Same for other chromosomal compositions. Most XO (Turner’s syndrome) almost always can’t. XXY men typically have issues with low sperm count, but can reproduce naturally or with treatment. I have never said it’s a binary—it’s bimodal. Almost all people are going to fall into one of the two peaks (biological male or female).
For all but a tiny subset, biological sex in the end comes down to what gametes you would contribute to the next generation and how you contribute physically (with the caveat that there is not an infertility issue).