For a diploid species,assume one set of 100 demes, each with a constant size of

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Question

For a diploid species,assume one set of 100 demes, each with a constant size of 10 individuals and another set of 100 demes, each with 100 individuals.
If I’m each deme the frequencies of the neutral alleles A1 and A2 are .2 and .8, respectively l, what fraction of demes in each set is likely to become fixed for Allele A1 vs A2? For a diploid species,assume one set of 100 demes, each with a constant size of 10 individuals and another set of 100 demes, each with 100 individuals.
If I’m each deme the frequencies of the neutral alleles A1 and A2 are .2 and .8, respectively l, what fraction of demes in each set is likely to become fixed for Allele A1 vs A2?
If I’m each deme the frequencies of the neutral alleles A1 and A2 are .2 and .8, respectively l, what fraction of demes in each set is likely to become fixed for Allele A1 vs A2?

Explanation / Answer

In a given population if there are two variants of alleles then only one of the allele remains which is called as fixed allele. Hence fixed allele is the only allele that exists in all the population.

The probability of one allele will be fixed rather than the other is equal to their initial frequency of that allele. So the probability that an allele becomes fixed is equal to its frequency.

Here A1 is 0.2 and the probability of A1 to become fixed is 0.2×100 = 20%

And A2 is 0.8 the probability of A2 to become fixed is 0.8×100= 80%

Here the probability of A2 to gets fixed is higher than A1. Hence A1 vs A2 20% and 80%.

The probability of fraction of demes likely to be fixed for A1 in each set of 100 demes with 10 individuals would 2/10 individuals in each deme and demes with 100 individuals would be 20/100. Because the fraction for 20% for A1 is 2/10.

And the probability of fraction of demes with 10 individuals for A2 would be 8/10 and with 100 individuals would be 80/100 in each set of demes.

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