National Geographic explains the biology of homosexuality

NatGeo explains how one's sexual orientation is determined during embryonic development. They look at how it is possible for one identical twin to be gay and the other to be straight. They address a new branch of Genetics called, Epigenetics. This area of Genetics explores and explains how one's DNA sequence is NOT the only factor in one's phenotypic (actual) outcome. This episode explains how both twins could have the gene for a disorder, yet only one twin actually has the disorder. The same science explains sexual orientation differences in twins. I have only included the homosexuality explanations.

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[VirtualBilly]

my absolute favorite part about this upload is how dianegosh uses the word "disorder", then only uses "homosexuality" as an example. haha, lol... that's so true.

[dianegosh]

Uhh........where do I use the word disorder?? This video was one hour long. Homosexuality was only one of the genetic differences shown between identical twins

[dannlynch]

science is so lame.  if we knew 'why' it wouldn't matter either way. it's a like a kid asking 'why why why '. they never get an answer. get over it. who cares?????????

[KayoteThunder]

@plhglh1 And so what if it is a chemical imbalance? It doesn't cause any real problem. Homosexuality is only an issue when people choose to make it an issue. Other than that homosexuals can live healthy successful lives and happy lives.

[AnaLetixoxo]

Surely I was sinful at birth, sinful from the time my mother conceived me. Psalm 51:5

[Colleen Lacey]

Its fascinating. Could be true. I hope they find out soon, so everyone can move towards accepting homosexuals as nature's way of balance or just naturally created diversity in species. :-) It is also proven we are NOT the only species this happens to. Wish the majority of the world were open minded.

[RocketCatcher]

National geographic cannot be trusted. Not so long ago they where advertising their wicked ideas of the possibility to inhabitant mars, and use global warming, which is thus far not been proven to even exist, to make the circumstances there similar to earth.

As for this video, it's based on pretty much the same foundation: theories. Unconfirmed assumptions- not actual proof, but fiction.

[spartacandream]

ratings disabled? Why?

[mrsupreme45]

I really found this fascinating, to bad I dont have the channel though :( I also found it interesting that Jesus has the more masculine features of the two, pause around 6:20 and you can see that his jaw is more defined as well as his eyebrows, while the other has more prominent cheek bones, which would explain the theory of Jesus receiving more testosterone in the womb. Of course this is just my opinion.

[Exciteme777]

@CJBVStudios2, every disease and disorder is "natural" with environmental influences in some cases. There could be videos on all kinds of disorders to show a biological basis for their existence, but that still doesn't change the fact that these diseases and disorders are unhealthy and abnormal.

[Exciteme777]

@CJBVStudios2, every disease and disorder is "natural" with environmental influences in some cases. There could be videos on all kinds of disorders to show a biological basis for their existence, but that still doesn't change the fact that these diseases and disorders are unhealthy and abnormal.

[pocket1]

lol i didn't know u could choose to be born gay