Question: The following questions pertain to yeast mating type regulation. Include the reason for your answ…

The following questions pertain to yeast mating type regulation.
Include the reason for your answers:

a) What mating-type phenotype would you expect of a haploid cell
of genotype MATa‘, where the prime denotes a
mutation that renders the a1 protein inactive?

b) What mating type would you expect from a diploid
MATa‘/MATα, where the prime denotes a mutation
that renders a1 protein inactive?

c) What mating-type phenotype would you expect from a diploid
cell of genotype MATa/MATα with a mutation in α in
which the α2 protein functions normally in turning
off a-specific genes but is unable to combine with
the a1 protein?

Please explain