A Haploid Yeast Strain Has Mating Type a and Genotype

question 19

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

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