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  #1  
Old 11-24-2007, 10:02 PM
Tweety Tweety is offline
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Default Homosexuality and natural selection

If homosexuality is genetic (trendy view nowadays and one I actually agree with), now that it is increasingly ok to come out of the closet, won't homosexuality be naturally selected out? (i.e the gay gene won't be passed on). In past generations homosexuality was repressed and so gay people were forced into child-producing hetrosexual relationships. As that changes, will homosexuality be naturally selected out?
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  #2  
Old 11-24-2007, 10:23 PM
ChrisV ChrisV is offline
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Default Re: Homosexuality and natural selection

From Wiki:

[ QUOTE ]
Some scholars have suggested that homosexuality is adaptive in a non-obvious way. By way of analogy, the allele (a particular version of a gene) which causes sickle-cell anemia when two copies are present may also confer resistance to malaria with no anemia when one copy is present.[citation needed]

The so-called "gay uncle" theory posits that people who themselves do not have children may nonetheless increase the prevalence of their family genes in future generations by providing resources (food, supervision, defense, shelter, etc.) to the offspring of close relatives. This "gay relative" hypothesis is an extension of the theory of kin selection. Kin selection was originally developed to explain apparent altruistic acts which seemed to be maladaptive. The initial concept was suggested by J.B.S. Haldane in 1932 and later elaborated by many others including John Maynard Smith and West Eberhard.[3] This concept also was used to explain certain social insects where most of the members are non-reproductive.

[/ QUOTE ]
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  #3  
Old 11-24-2007, 10:56 PM
furyshade furyshade is offline
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Default Re: Homosexuality and natural selection

this is flawed because straight people have gay children, so the gene must be recessive or a product of some combination of other genes.
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  #4  
Old 11-25-2007, 02:59 AM
soon2bepro soon2bepro is offline
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Default Re: Homosexuality and natural selection

[ QUOTE ]
this is flawed because straight people have gay children, so the gene must be recessive or a product of some combination of other genes.

[/ QUOTE ]

Wrong. The "gay gene" can be within every single human being, but that doesn't mean everyone will be gay. Just some of them. The gene "triggers" on some occasions or under certain circumstances.

Most ants are female and infertile. Very few are fertile, and there are pretty much the same number of males as fertile females (as it must be because of the "expected value selection").
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  #5  
Old 11-25-2007, 03:01 AM
willie24 willie24 is offline
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Default Re: Homosexuality and natural selection

i don't see how it's flawed based on your reasoning. the gene could be recessive or the trait could need an environmental trigger. how does that make the idea flawed?

(i personally think it's unlikely that "gayness" is adaptive, but the idea isn't flawed because straight parents have gay kids)
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  #6  
Old 11-25-2007, 03:17 AM
furyshade furyshade is offline
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Default Re: Homosexuality and natural selection

[ QUOTE ]
i don't see how it's flawed based on your reasoning. the gene could be recessive or the trait could need an environmental trigger. how does that make the idea flawed?

(i personally think it's unlikely that "gayness" is adaptive, but the idea isn't flawed because straight parents have gay kids)

[/ QUOTE ]

its flawed in that if what you say there is true, doesn't that invalidate your OP?
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  #7  
Old 11-25-2007, 03:34 AM
willie24 willie24 is offline
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Default Re: Homosexuality and natural selection

[ QUOTE ]
[ QUOTE ]
i don't see how it's flawed based on your reasoning. the gene could be recessive or the trait could need an environmental trigger. how does that make the idea flawed?

(i personally think it's unlikely that "gayness" is adaptive, but the idea isn't flawed because straight parents have gay kids)

[/ QUOTE ]

its flawed in that if what you say there is true, doesn't that invalidate your OP?

[/ QUOTE ]

huh? wasn't that my original post?
the gene being recessive or the trait needing an environmental trigger invalidates...the idea that being a "gay uncle" could be adaptive? no.
i guess i don't follow.

maybe you mean that it means that the answer to the orignal poster's question "will natural selection eliminate the trait" is no. sure, if the "gay uncle" hypothesis is right, the answer to that question would be no. still not sure that that's what you meant.
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  #8  
Old 11-25-2007, 03:36 AM
Fly Fly is offline
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Default Re: Homosexuality and natural selection

[ QUOTE ]

As that changes, will homosexuality be naturally selected out?


[/ QUOTE ]

Homosexuality may very well be a side effect of a gene (or combination of genes) that confers some more significant advantage. If thats the case, it won't be selected out.
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  #9  
Old 11-25-2007, 10:39 AM
Tweety Tweety is offline
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Default Re: Homosexuality and natural selection

[ QUOTE ]
From Wiki:

[ QUOTE ]
Some scholars have suggested that homosexuality is adaptive in a non-obvious way. By way of analogy, the allele (a particular version of a gene) which causes sickle-cell anemia when two copies are present may also confer resistance to malaria with no anemia when one copy is present.[citation needed]

The so-called "gay uncle" theory posits that people who themselves do not have children may nonetheless increase the prevalence of their family genes in future generations by providing resources (food, supervision, defense, shelter, etc.) to the offspring of close relatives. This "gay relative" hypothesis is an extension of the theory of kin selection. Kin selection was originally developed to explain apparent altruistic acts which seemed to be maladaptive. The initial concept was suggested by J.B.S. Haldane in 1932 and later elaborated by many others including John Maynard Smith and West Eberhard.[3] This concept also was used to explain certain social insects where most of the members are non-reproductive.

[/ QUOTE ]

[/ QUOTE ]

Genetic but environmental? I wonder what Darwin would think of that.

Sounds like crap to me.
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  #10  
Old 11-25-2007, 12:17 AM
InTheDark InTheDark is offline
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Default Re: Homosexuality and natural selection

[ QUOTE ]
If homosexuality is genetic (trendy view nowadays and one I actually agree with), now that it is increasingly ok to come out of the closet, won't homosexuality be naturally selected out?

[/ QUOTE ]

I have nothing here to go on other than a dozen years in San Francisco but I'm 90% convinced that most gay men are way more promiscuous than the general population. Since men are much more interested in casual sex, finding enough partners for the truly randy is almost impossible. That leads to their own club, the gay men by choice.

Besides, if it's genetic we'll soon be able to test for it in vitro and abort them. I can hear them screaming already.
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