A Haploid Yeast Strain Has Mating Type a and Genotype

Multiple Choice

A haploid yeast strain has mating type a and genotype his4 TRP1. A different haploid yeast strain has mating type ? and genotype HIS4 trp1. The two strains mate and produce diploid offspring with genotype his4 TRP1 / HIS4 trp1. The diploid cells undergo meiosis to produce a variety of tetrad types. In the following questions, the genotypes of the spores in a tetrad are shown. For each tetrad, tell what type it is: parental (PD) , non-parental (NPD) , or tetratype (T) .
-HIS4 trp1; HIS4 trp1; his4 TRP1; his4 TRP1

A) PD
B) NPD
C) T
D) cannot be determined