Suppose meiotic drive affects the pollen only and that 80% of the pollen grains from a heterozygote carry the A allele. Ovules are normal and 50% of them carry the A allele.
We have seen that meiotic drive (where one allele pushes its way into more than half of the gametes) can lead to deviations from normal proportions of offspring genotypes. Find the probability that an offspring from a selfing heterozygote with genotype Aa has zero, one, or two A alleles. Which cases follow a binomial distribution?