On 05/07/2006, at 2:29 AM, The Fool wrote:
1st generation children would have about 23 chromosomes from lone
invader-parent.
2nd gen would have on average 11-12 chromosomes.
3rd gen would have on average 6 chromosomes.
4th gen would have on average 3 chromosomes.
5th gen would have on average 1-2 chromosomes.
6th gen would on average have 1 or less chromosomes.
This ignores selection of course.
And crossover and so on during meiosis which mixes up chromosomes,
and inbreeding in small populations.
At an average of 2 surviving children per generation, there would at
generation 6 be about 64 decendents with aproximately 1
chromosome. The Lone
Invader Parent had 46 chromosomes, as compared to about 64 individual
surviving chomosomes in his descendents, most of them duplicates.
(This
ignores inbreeding, which is endemicic in certain populations,
mostly arabic,
that for reasons of maintaining property rights, marry first cousins).
Ah, I see you've introduced inbreeding here.
Let's look at a stable population of 100 individuals with a single
invader.
Say the invader married and had 2 kids. They marry and have two kids.
Etc. While yes, there will be individuals who are descended from the
invader by the 6th generation who might not share a chromosome
directly, by that point over half the population could count the
invader as an ancestor, and by the seventh, all the tribe could.
Charlie
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