Re: 50/50 elections

From: Ronald Crane <voting_at_lastland_dot_net>
Date: Fri Nov 28 2008 - 14:17:00 CST

Edward Cherlin wrote:
> On Fri, Nov 28, 2008 at 10:57 AM, David Brown <dmbrown@icubed.com> wrote:
>
>> ...
> ...There is no mechanism to create and maintain a 50-50 genetic split in
> a population, other than male-female.
>
Without commenting on the election issue, there are several possible
mechanisms that could maintain a 50-50 distribution of two alleles.
Here's one: imagine that only alleles A and B of some gene exist in the
population, and that those who inherit AB or BA survive, while those who
inherit AA or BB die before birth. If the population starts out, say,
with an excess of AB individuals, their descendants will, all else being
equal (i.e. no imprinting effects), inherit AA, AB, BA, and BB each with
P=0.25. All AA and BB individuals will die, leaving AB and BA
individuals, each with P=0.5.

-R
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Received on Sun Nov 30 23:17:21 2008

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