In a laboratory population of drosophila, all the males are xsy. among the females, 15% are xixi, 50% are xixs and 35% are xsxs. assuming random mating, what proportion of the male flies in the next generation will be xiy?
a. 12% b. 30% c. 40% d. 65%
2. a virgin female drosophila mates and produces 34 daugthers and 38 sons. 18 of these sons sire only daughters, while the remainder sire approximately equal numbers of daughters and sons. what the gynotypes of the original female and the male with whom she mated
a. xixs and xsy b. xixs and xiy c. xixi and xsy d. xsxs and xiy
3. if the e and f are expressed, the xi chromosome will be prevented from reaching 100% frequency if selection pressure cause which of the following to be true?
a. xsxs flies have the lowest fitness of any genotype b. xsxs flies have the highest fitness of any genotype c. xiy flies and xsy flies have equal fitness d. xixs flies xsxs flies have equal fitness
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