OT On Marriage (From another list)

[abatzis2 at hotmail.com (Michael Abatzis)]

heterozygous is just having 2 mismatched chromosomes, like x and y. 
recessive/dominant refers to the expression of the genes on the chromosomes; 
it's the end result. for example, blue eyes are a recessive trait. you need 
2 "blue" genes (bluejeans? :) to have blue eyes. "brown" is the dominant 
gene; if you have only 1 "brown" gene, you have brown eyes. so 
brown/blue=heterozygote with brown eyes (because brown is dominant), 
brown/brown=homozygote with brown eyes, blue/blue=homozygote with blue eyes. 
so actually, the y chromosome is dominant because it only takes 1 to have 
"maleness" expressed (=male phenotype). and no, not all males are xy and 
females xx. it's just that other combinations can live, but aren't normal.

-Michael Abatzis, finally using his college major.
New Orleans!
1988 Scirocco 2L 16v RIP
1987 Scirocco 2L 16v...



>From: David Utley <mr.utility@highstream.net>
>To: C Boyko <roccit_53@hotmail.com>
>CC: jlagnese@massed.net, scirocco-l@scirocco.org
>Subject: Re: OT On Marriage (From another list)
>Date: Fri, 20 Feb 2004 17:12:10 -0500
>
>Quoting C Boyko <roccit_53@hotmail.com>:
>
> >
> > Why, you ask?  (Cuz' you didn't)  The female chromosone is XX, and the
> > > > male is
> > > > > XY.  We are recessive, not dominant...
> >
> >
>
>
> > Well, you could still be either, but it's impossible for you (guys) to 
>be
> > heterozygous on that unmatched strip of chromosome. Is recessive better?
>
>No, just more likely to be rare (as I remember, but we have already seen 
>that
>my sources may be suspect...)
>
> > Depends on the gene, if it's hemophilia, I'd say no. But one more 
>tidbit,
> > the X chromosome is essential, you can have just one and live, though 
>you've
> >
> > got a "syndrome" if you have only that without a Y or another X. There 
>is no
> >
> > case of someone surviving that I'm aware of with only a Y. Not enough 
>info
> > on it. It codes for all that maleness stuff.
> > Cathy
> >
>
>I thought that if you were male, you HAD to be XY, and female HAD to be XX
>('cept for K.D. Lang)...  This is not the case?
>
>And remind me, what exactly doe heterozygous mean?
>
>
>Thanks,
>
>--
>Regards,
>David Utley
>-----------
>Cable Volkswagen
>405-470-3129
>1-800-522-6793
>
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