A third haploid pink strain (strain # 3) of yeast is isolated and known to be...

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Biology

A third haploid pink strain (strain # 3) of yeast is isolatedand known to be the MAT a sex. Nothing else is known about thisstrain, (i.e. we do not know whether it is a single or doublemutant as we did in our lab results). When streaked together withstrain #1 above the cells produced at the crossing juncture are allpink. Answer these questions:
a) Would you expect these pink cells at the strain 1-3 crossingjuncture to be diploid or haploid? Why?
b) Is strain #3 mutant for ade2 (i.e. ade2) or wild type forade2 (i.e. ADE 2). How do you know?
c) It is not clear what the genotype of strain#3 is at the ADE 1locus.
i. What cross and result would determine that strain #3 ismutant (i.e. ade1)?
ii. What cross and result would determine that strain #3 is wildtype (i.e. ADE 1)?

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4.0 Ratings (677 Votes)

as we do not have information about which strain is 1 strain is but i will try to answer ADE2 gene encodes for AIR carboxylase which catalysed purine biosynthesis pathway mutation in this gene See Answer

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