A fruit fly breeder accidentally contaminated a population of dominant somatic chromosome mutations with wild-type fruit flies. All flies were initially homozygous for the mutation, but after 10 generations some wild-type species were discovered. At this point, care begins to be taken to prevent further contamination. Suppose we make the following assumptions: (1) 1% of the flies in each generation are contaminants, (ii) all contaminants are homozygous wild type (iii) the mutant type has the same fitness as the wild type. With these assumptions, then
(1) What is the proportion of wild type in the generation after the last contamination?
(2) What proportion of fruit flies with mutant phenotypes are heterozygous?
