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Title: WATCH: What Does Science Actually Say About Whether There's a Gay Gene?
Source: [None]
URL Source: http://www.sciencealert.com/watch-w ... out-whether-there-s-a-gay-gene
Published: Aug 4, 2017
Author: JACINTA BOWLER
Post Date: 2017-08-04 07:43:15 by Tatarewicz
Keywords: None
Views: 281
Comments: 3

Sci-alert...

It's thought that between 2 and 6 percent of people identify as same sex attracted – but the jury is still firmly out on the science on why and how it occurs.

Is being gay genetic, and if so, is there a gay gene?

Well, as the boys from AsapSCIENCE explain, having a specific gay gene that can be passed on doesn't make a lot of sense considering how few same sex couples have kids.

However, that being said, two studies in the 1990s found that gay men do have a higher number of homosexual relatives compared to heterosexual men.

This led the researchers to think that being gay had something to do with a linkage on their X chromosome.

As the video explains, this has also been found in newer studies – specifically a part of the X chromosome called Xq28.

But with 80 percent less children then straight couples, purely genetic inheritance of same sex attraction can be something of a paradox.

So it's obviously more complicated than that – and that means that epigenetics gets involved.

A recent study looked at whether the attachment of a type of a methyl group (a type of epigenetic DNA change) changes your likelihood of same sex attraction.

The team were able to use that methyl groups to predict the sexuality of men with 70 percent accuracy.

However, it was a small population size, and there has been some controversy about the research.

So where does this leave us?

Well, I'll let the AsapSCIENCE boys explain the rest in the video above, but there are quite a few interesting hypotheses about how being gay fits into the world.


Poster Comment:

Probably off-guard imprinting error.

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#1. To: Tatarewicz (#0)

There are identical male twins where one is gay and the other non. If there were a gay gene, both of them should have the same orientation.

Ada  posted on  2017-08-04   8:37:45 ET  Reply   Trace   Private Reply  


#2. To: Ada (#1)

Certain physiological/hormonal and psychological/mood conditions probably required to establish an affinity circuit in the brain. If the circuit is mistakenly activated in the presence of a person of the same sex and becomes ingrained: big trouble.

Tatarewicz  posted on  2017-08-05   3:04:47 ET  Reply   Trace   Private Reply  


#3. To: Tatarewicz (#2)

Certain physiological/hormonal and psychological/mood conditions probably required to establish an affinity circuit in the brain. If the circuit is mistakenly activated in the presence of a person of the same sex and becomes ingrained: big trouble.

Still doesn't explain the identical male twins. There is some evidence that the mother's hormones while in the placenta might cause male homosexuality. Evidence for that comes from male children born in Germany the last days of WWII where the mothers were under great stress and produced an abnormal number of gay males.

Ada  posted on  2017-08-05   9:53:08 ET  Reply   Trace   Private Reply  


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