Questions about genders ... male/female

[Reader]

Why do we only have two genders, male and female? [excluding asexual animal reproduction] ... just humans and almost all animals? Why only two? Why not ... say ... seven, or seven-thousand? If we have evolved over time from a single celled organism ... why did we only evolve into two genders and not more? Why did it stop at two? Thanks for your time.

It's easier to code for two genders than three or four, and the genetic recombination from two genders is sufficient to produce a broad array of varieties.
Also, you have a familiar style. Have you posted here or on other atheist forums before?

Thanks for your reply. No, I am new here, have not posted here or in any other atheist forum before.

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Thanks, Beccs! I call it atheistic, because God is taken out of the equation. But the question is ... why did we stop evolving after two genders? Why don't we have more now? Like 7 or 7,000 or something along those lines?

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Because two genders are all we need. If more were required we would have evolved that way.

Thanks for that insight. What about the "transgender community" ... does it require a new gender? Or will male/female just have to work for them as is? I'm just thinking out loud here.