2007-08-23 22:15:07 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Biology
yes, actually a whole book come out (sorry for the pun, wasn't on purpose) recently. It gather great stories about twins, like the story of triplets, where one was gay, and a couple of twins girls where one changed sex.
Not everything is down to DNA. Recent studies keep confirming so. The foetal stage and the bringing up, the enviroment, the friends...it all plays a role.
The Book is called "Indivisible by Two: the lifes of extraordinary twins" by Nacy Segal. Follow the link bellow..
2007-08-23 22:25:02 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Yes. Even though it is probably to some degree inheritable, it will also be affected by other factors during growing up.
Compare it to cancer, which is also more or less genetically determined. However, if one of two similar twins is a heavy smoker and the other is not, it is quite possible that only he gets the disease.
2007-08-24 05:28:48 · answer #2 · answered by Anonymous · 1⤊ 0⤋
There is some evidence that homosexuality comes about because of conditions in utero during the mother's pregnancy. This would mean it is not genetic, but environmental.
But, there is, as yet, no final answer on the cause. There may be multiple things like genetic causing a predisposition and then environment adding to that.
2007-08-24 09:00:42 · answer #3 · answered by Joan H 6 · 1⤊ 0⤋
why not? they can still be individuals, my nephews are identical and have no similar interests at all
2007-08-24 05:22:55 · answer #4 · answered by t.s 5 · 1⤊ 0⤋
just because of environmental factors their interests can be different. but if you're asking for genetic factors it won't happen naturally.
2007-08-24 05:26:55 · answer #5 · answered by ida 2 · 0⤊ 1⤋
At least that would be one way of telling them apart...
2007-08-24 05:49:25 · answer #6 · answered by Anonymous · 1⤊ 1⤋
yes - sexual preferences are not hereditary
2007-08-24 05:27:43 · answer #7 · answered by Tony P 2 · 1⤊ 0⤋