A neighbouring population on Island B, has LM frequency = 0.8 and LN = 0.2. C. T

Question

A neighbouring population on Island B, has LM frequency = 0.8 and LN = 0.2.

C. The two populations have never “met” before, but then 200 mice from population B travel to island A by accident on a floating raft of logs and plant material. What will the allele frequencies in this new merged population be?

The frequencies in island A: p is 0.3 (LM) and q is 0.7 (LN)

D. Suppose that positive assortative mating takes place in this new population and mice now only mate with mice of the same MN blood type as themselves. What will the allele frequencies be after one generation of this assortative mating?

Explanation / Answer

One of the formulation of Hardy Weinberg`s equillibrium is -

No migration - so no alleles enter or leave the population. But here in the above question migration occurs as 200 mice are moving to another island.So there would be no Hardy Weinberg`s equillibrium in there population and allele frequency cannot be calculated on the basis of the equation- p2 + 2pq + q2 as the distribution of the genotypes.

Thus the new frequency in the merged island would be same as before.

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