(April 17, 2017 at 10:49 pm)Catholic_Lady Wrote:(April 17, 2017 at 6:15 pm)Mathilda Wrote: That's an extremely narrow view of biolgical sex. Genes may or may not get expressed throughout a lifetime or are expressed at certain times. This is why babies do not grow beards for example. There is also a stochastic mapping from genotype to phenotype. The Y chromosone also isn't devoted to sexual differences and encodes many other things as well.
It's like saying that no matter how badly you follow the recipe for souffle, you will always end up with a souffle, even if what you end up with is indistinguishable from a loaf of bread.
Narrow minded view of biological sex? Lol, biological sex is specifically determined by the sex chromosomes. I'm not talking about gender identity. And yes, if a zygote/embryo/fetus has a y chromosome, he is biologically male. That's the whole definition of biological sex.
Saying we all start off as females is incorrect.
Holy crap, this is madness.
(April 17, 2017 at 8:16 pm)Tiberius Wrote: I think you have an extremely unscientific view of biological sex to be honest. What Catholic Lady said was correct. The XY sex-determination system is a legitimate system for determining biological sex in humans. At the moment of conception a baby has either XX or XY chromosomes that determine the biological sex of the baby.
https://en.wikipedia.org/wiki/Sexual_dif..._in_humans
A fetus doesn't develop sexual organs until the 7th week after conception, but lack of sexual organs doesn't mean the fetus isn't genetically either a boy or a girl.
There are of course some exceptions for intersex and hermaphrodites, but I can't find anything that supports your claim that humans are conceived as "females" before turning into males.
Ah, thank goodness for you. I thought I was about to go crazy.
"Go"?
Playing Cluedo with my mum while I was at Uni:
"You did WHAT? With WHO? WHERE???"
