AHHH...I have been enlightened :) I'm currently a freshman major in
wildlife science and haven't had the privilege of hitting genetics yet, only
what I know from high school, bio 111G (NMSU course number) and from what
I've read. I kind of figured snow corns to be "co-dominant" in the sense
that the animal (snow corn) is expressing albinism and anerythism at the
same time. Though, now that I think about it it isn't, seeing as how a snow
corn is just an albino anerythristic. Hmmm, I have confused myself
somewhere. Oh well. Thanks for more knowledge on genetics.
Later,
Chris
hmmm.....biology or genetics major? hmmmmmm? hehehe
----- Original Message -----
From: Greg Watkins-Colwell <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, March 30, 2001 5:30 PM
Subject: Re: [Gecko] Couldn't Help It
> on 3/30/01 8:54 PM, Chris at [EMAIL PROTECTED] wrote:
>
> > I'm trying
> > to remember if snow would be an example of either incomplete or
> > co-dominance.
>
>
> are you talking about in corn snakes? It's neither incomplete dominance
nor
> co-dominance. it is the expression of two different genes, not two
> different alleles of the same gene. It is the result of a dihybrid cross
> (and you are right... the standard mendelian ratio would be 9:3:3:1 for
the
> F2.. thus 9 would appear normal, 3 would be amel. and 3 would be
> anerythristic, but only 1 would be both traits at once... and thus snow...
> you would only KNOW the genotype of the snow of course... the others could
> easily... and some would be... heterozygous for the other character).
>
> Co-dominant would be when two traits are both dominant and are both
> expressed at the same time... like blood type AB or chocolate labs (more
> complicated I've heard... many genes... may not be a good example).
> incomplete penetrance would be when a recessive gene bleeds through...
like
> pink snapdragons.... red is dominant to white, but when you cross them you
> get pink, to varying degrees.
>
>
> Greg
>
> --
> Gregory J. Watkins-Colwell
> Dept. of Biology
> Sacred Heart University
> 5151 Park Avenue
> Fairfield, CT 06432
>
> and
>
> Yale Peabody Museum
> Dept. of Vertebrate Zoology
> 170 Whitney Ave
> PO Box 208118
> New Haven, CT 06520-8118
> Fax 203-432-3758
>
>
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