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Old 24th November 2021, 10:09 AM   #8
Louden Wilde
Critical Thinker
 
Join Date: Oct 2020
Location: NYC
Posts: 372
Originally Posted by d4m10n View Post
I'm not sure what it would take to convince me that sex is a spectrum. I've seen the Quigley scaleWP and that convinces me that genital morphology is indeed a spectrum, but I tend to think of sex as an evolutionary adaptation which facilitates reproduction of individuals. Since these individuals have to contribute different sex cells (oocytes and spermatozoa in our species) I'd say the process of sexual reproduction is rooted in a binary at the gamete level.
Yes, evidence suggests that every therian mammal that has ever reproduced has done so either by producing one of those two gamete types. Sex seems to be the preferred method of reproduction over parthenogenesis due to its conferring novel genetic combinations. In fact, mammals have evolved differential epigenetic marking of some genes in the two gametes (resulting in their silencing) that precludes parthenogenesis. Meaning you need one of each gametes type for normal development.

ETA- the pseudo-penis of spotted hyena (Crocuta crocuta) females is the classic example of what you're saying.

& it should take a new gamete type/reproductive role to convince anyone that their is another sex besides female & male.

Last edited by Louden Wilde; 24th November 2021 at 10:15 AM.
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