They can't explain either what cuttlefish have to do with the reproduction of those mammals called HUMANS
Borrowed from FB:
'My point by point response [in parentheses]...
I just commented this on a transphobic post that was all like, "In a sexual species, females have two X chromosomes and males have an X and a Y, I'm not a bigot it's just science." I'm a science teacher so I responded with this.
~(Biology isn't bigotry... and thanks for letting us know that we should now have an expectation of scientific objectivity from you...)
First of all, in a sexual species, you can have females be XX and males be X (insects), you can have females be ZW and males be ZZ (birds), you can have females be females because they developed in a warm environment and males be males because they developed in a cool environment (reptiles), you can have females be females because they lost a penis sword fighting contest (some flatworms),
~(all of these examples are false equivalencies. None of these animals reproduce how mammals do.)
you can have males be males because they were born female, but changed sexes because the only male in their group died (parrotfish and clownfish), you can have males look and act like females because they are trying to get close enough to actual females to mate with them (cuttlefish, bluegills, others), or you can be one of thousands of sexes (slime mold, some mushrooms.)
~(Again... not mammals of any sort...)
Oh, did you mean humans?
~(Yes. Because we are humans who reproduce just like other mammals reproduce)
Oh ok then. You can be male because you were born female, but you have 5-alphareductase deficiency and so you grew a penis at age 12.
~(Sexual developmental defect a-typical and so rare that there isn't quantifiable data to produce occurrance rates...)
inYou can be female because you have an X and a Y chromosome but you are insensitive to androgens,
~(genetic sexual development defect which occurs in roughly 2 of every 100k males. Still male bodies however.)
and so you have a female body.
You can be female because you have an X and a Y chromosome but your Y is missing the SRY gene, and so you have a female body.
~(Swyer syndrome. Another sexual development defect. Occurs in 1 of every 80k people.)
You can be male because you have two X chromosomes, but one of your X's HAS an SRY gene, and so you have a male body.
~(Also Swyer syndrome occuring in 1 of 80k people)
You can be male because you have two X chromosomes- but also a Y.
~( Klinefelter syndrome which affects 1 in 500 to 1,000 newborn males. Most variants of Klinefelter syndrome are much rarer, occurring in 1 in 50,000 or fewer newborns)
You can be female because you have only one X chromosome at all.
~(Turners syndrome... female with a frequency of about 1/2500 live births. Often those children do not survive. Turners is most frequently diagnosed after stillbirth or miscarriage.)
And you can be male because you have two X chromosomes, but your heart and brain are male.
~(This is woo. There's no such thing as a male or female brain. Actual physical hearts are different between male and female bodies. Male hearts are significantly larger. Female hearts beat faster. Symptoms of heartbattacks present very differently between males and females.)
And vice - effing - versa. Don't use science to justify your bigotry.
~(dont use science to justify your political feel good agenda. That's not the job of science.)
The world is way too weird for that shit.
~(The world is way too weird and you just keep making it weirder by pretending this is more complicated than it actually is.)
ACTUAL SCIENCE MIC DROP
Also you failed at the expectation set at the beginning that you know anything about biology or how to employ Scientific Method.
Pretending that genetic abnormalities that have a ridiculously low frequency are any sort of validation that subjective feelings makes people change sex is actually ableist and super misogynistic."