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[–]fijupanda 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

To answer some of your qs...

Sex is genetic. Our cells are either XX chromosomes or XY chromosomes. Women are XX, men are XY. We all start as female in the womb, only after 6 weeks does a gene activate the Y chromosome... source: https://www.youtube.com/watch?v=z1Kdoja3hlk&feature=emb_title

https://www.realclearscience.com/blog/2013/11/male_and_female_cells_are_not_the_same.html