Are you a CHIMERA? Is it really only YOU inside YOU? Lesbians? Gays?

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I am a person that is very interested in the field of science, especially those of which you call medical anomalies. I have come across this and was greatly fascinated by this condition when I have watched an episode of CSI last 2004 titled Bloodlines. It was about a man who raped a woman but they could not pin the case on him even if the victim has positively ID'd the guy because the DNA was different. I found it quite interesting but then did not look much into it until I watched an episode of HOUSE which again involved CHIMERISM. And that is when I took notice seriously and made inquiries. I am a nursing student now and I find it troubling that on our Human Development subject they have failed to inform us that the blood of the mother carrying her other cells indeed pass through the placenta barrier which otherwise they say is not possible. Then i said to myself the human body is indeed amazing. Being a chimera means carrying 2 sets of DIFFERENT DNA in a single body. This means that there are "Two persons within a SINGLE body". Most of your parts may carry DNA1 and some of it will carry DNA2. It is said that on some studies that Female cells made the brain and male cells made the rest of the body. Though it did not have an extensive explanation on the psychology on chimerism because it was more focused on the medical side, I made me ask this question. If being a chimera is not really rare as previously thought, and they have found it across all life forms on earth, then is it wrong to think that maybe gays and lesbians are not the product of the environment but of genetics?*************** Please NOTE: I am not being mean, disrespectful or badmouthing the gays and lesbians out there. I have 2 lesbian aunts, 3 gay cousins, 2 gay uncles, 1 lesbian great aunt and 2 gay great uncles and some gay and lesbian buddies. And I am very proud of them. ********************* If this indeed occur within the earliest time of development of life inside our mothers womb, is it wrong to think and ask that maybe these conditions may be attributed and may well be present before we are even born? Some say that being gay or a lesbian is abnormal (that's the view in our country even long before especially those in very strict, uptight and traditional and religious families) because a guy should act like a guy and a girl should act like a girl, otherwise that's abnormal. But WHAT IF? What if our genetics where really responsible. What if there is another YOU inside YOU? All opinions are welcome. If you also happen to know more about this please post the site or the title and author of a book or publication of anything related to chimerism. And add more info. Thank you Please refer to the sites below for more detailed explanations:http://www.answers.com/topic/chimera-genetics#wp-_note-0 http://www.fhcrc.org/about/ne/news/2003/11/17/infant_heart_damage.html