You?ve just isolated a new dominant mutation of the testy (ty) gene in the spott

Question

You?ve just isolated a new dominant mutation of the testy (ty) gene in the spotted sniggle wiggle. You suspect that your new allele is a hyper morph, so you?ve tentatively notated it as ty?; you?re anxious to confirm this functional assignment. Other alleles have already been fully characterized: the null allele, ty0, a partial-loss-of-function allele, and a geomorphic allele, ty1?00. However, no hyper orphic allele had been described previously, so you?re very excited. Using both wild-type and ty1 flies, you?ve been successful in generating flies with small chromosomal duplicators that include either wild-type t!?. Part A What two genotypes could you use to compare phenotypes to provide definitive identification of ty^H as a hyper orphic mutation, rather than any other kind of dominant allele? Select all that apply. Part B You did it! You demonstrated genetically that t!? is a hyper morph. So, what would the most likely phenotypic result be for the ty^H/ tyy^o genotype?

Explanation / Answer

Part A- d

Part B- c

Part C- a

Part D - c

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