Karyotypes

[foxgrrl]

People frequently ask me whether I have XX or XY [sex] chromosomes. I honestly don't know. I've never been tested. What chromosomes do you have? I mean they test everyone don't they? It sure seems like they tested everyone but me…

Comments

[ff00ff.livejournal.com]

1/4 of these pregnancies will miscarry

I wonder where you found this factoid. It sounds weirdly incomparable to the number, 2/3, of fertilized zygotes in an XX woman which simply self abort. Unless the study doesn't count that baseline of self-aborting zygotes as miscarriages... I'm just saying it's a weird number, and I wonder where it comes from. The 2/3's figure is something I use against the pro-lifers when I want to smear their face in the fact that nature, or G-d if you will, is the greatest abortionist of all.

[ff00ff.livejournal.com]

Ah, Mendel Squares, yes I hadn't thought of it that way.

[varaviksne.livejournal.com]

Um, yeah. I don't know what really would happen to a YY embryo but it clearly isn't viable given that X chromosomes carry lots of important genes.

This diversion is probably not quite what perlandria had in mind...

[varaviksne.livejournal.com]

Hmmm, according to http://en.wikipedia.org/wiki/XX_male_syndrome , XX males are infertile, and according to http://en.wikipedia.org/wiki/Swyer_syndrome , XY females are too. See also: http://en.wikipedia.org/wiki/SRY

However, someplace I read that the SRY gene works via a long sequence of other sex determining genes. It seems plausible that a problem elsewhere in that sequence could result in the affects I wrote above.

[spider88.livejournal.com]

There's no such thing as a Y ovum. YY isn't just unviable, but impossible.