Awild-type strain of haploid yeast is crossed to a mutant haploid strain to make a diploid. what phenotypic ratios will be observed in the haploid progeny of the diploid? a. 50% wild-type and 50% mutant b. all wild-type c. 75% wild-type and 25% mutant d. 25% wild-type and 75% mutant e. all mutant