*why* does temp sexing work?

HepCatMoe · 11-07-2009, 10:03 AM

in humans your sex is dependent on what chromosome you get from your dad, x or y.

but in geckos, they get both from their dad?

can someone explain this to me?

acpart · 11-07-2009, 06:43 PM

I'm going to take a guess at this in the hopes someone with a better reptile genetics background corrects any mistake I may make. Humans inherit their sex chromosomes from both parents. As far as I understand it, it is these chromosomes that tell the body which hormones to release during fetal development to create the reproductive organs. In humans, interestingly enough, there can be some hormonal anomalies in the fetus that prevent the correct hormones from being released, resulting in babies with ambiguous gender (but that's another post). I am guessing that in reptiles, there are no gender chromosomes and it is the incubation temperature that causes the release of hormones that result in a male or a female.

Please let me know if I've got that wrong.

Aliza

HepCatMoe · 11-07-2009, 07:50 PM

after doing some quick googling, it appears that the current theory is what aliza is saying. mainly that many reptiles do not have sex chromosomes.

however, i did read the abstract of an article here which said that it doesnt have to be either temp determined or chromosome determined, but it is posssible to be a combination of both.

aliza, while its true that humans inherit chromosomes from both parents, it does not matter what sex chromosome you inherit from your mother, becuase it will always be an X chromosome.

Bongo · 11-07-2009, 08:23 PM

Interesting.

gitrdone0420 · 11-07-2009, 10:31 PM

That is interesting. I never really thought about this, I just took it for what it was. But now I know! yay, knowledge is power =] lol. Thanks for posting

11-07-2009, 10:03 AM	#1
HepCatMoe Escaped A.I. Join Date: Feb 2007 Location: Tempe Az Posts: 642 iTrader: (2)	why does temp sexing work? in humans your sex is dependent on what chromosome you get from your dad, x or y. but in geckos, they get both from their dad? can someone explain this to me? __________________ not all who wander are lost

11-07-2009, 07:50 PM	#3
HepCatMoe Escaped A.I. Join Date: Feb 2007 Location: Tempe Az Posts: 642 iTrader: (2)	after doing some quick googling, it appears that the current theory is what aliza is saying. mainly that many reptiles do not have sex chromosomes. however, i did read the abstract of an article here which said that it doesnt have to be either temp determined or chromosome determined, but it is posssible to be a combination of both. aliza, while its true that humans inherit chromosomes from both parents, it does not matter what sex chromosome you inherit from your mother, becuase it will always be an X chromosome. __________________ not all who wander are lost Last edited by HepCatMoe; 11-07-2009 at 07:52 PM..

11-07-2009, 08:23 PM	#4
Bongo Senior Member Name: Haley Join Date: Oct 2009 Posts: 108 iTrader: (1)	Interesting. __________________ My geckos: 2.2 African Fat-Tailed Gecko, 3.0 Leopard Gecko

11-07-2009, 10:31 PM	#5
gitrdone0420 Gotta catch 'em all! Name: Melanie Join Date: Jun 2009 Location: Jacksonville, Fl Age: 20 Posts: 750 iTrader: (2)	That is interesting. I never really thought about this, I just took it for what it was. But now I know! yay, knowledge is power =] lol. Thanks for posting __________________ 3.9.0 Leopard Gecko//1.0.0 Chinese Water Dragon//1.2.0 Dogs // 4.2.0 Cats // 3.0.0 Horses // 1.1.0. Chickens // 1.0.0 Boyfriend // http://www.myspace.com/xxleftovercrackxx

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11-07-2009, 06:43 PM	#2
acpart Geck-cessories Name: Aliza Arzt Join Date: Jun 2006 Location: Somerville, MA Age: 54 Posts: 3,505 iTrader: (13)	I'm going to take a guess at this in the hopes someone with a better reptile genetics background corrects any mistake I may make. Humans inherit their sex chromosomes from both parents. As far as I understand it, it is these chromosomes that tell the body which hormones to release during fetal development to create the reproductive organs. In humans, interestingly enough, there can be some hormonal anomalies in the fetus that prevent the correct hormones from being released, resulting in babies with ambiguous gender (but that's another post). I am guessing that in reptiles, there are no gender chromosomes and it is the incubation temperature that causes the release of hormones that result in a male or a female. Please let me know if I've got that wrong. Aliza

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