The yeast S. pombe normally divides when it reaches a certain size as is shown in the
wildtype in the figure below. You were excited to receive wildtypes and two "classic"
mutants, cdc25- and wee1-, from a collaborating lab. Unfortunately, you forgot label which
culture is which! You don't panic since you know this is not a problem. You simply look under
the microscope of samples from each culture and can identify which is which. Based on the
image below, which assumption is correct?
wild type
mutant 1
mutant 2
Mutant 1 is mutant for the wee1 gene that encodes an activating kinase.
Mutant 1 is a mutant for the CDC25 gene that encodes an activating kinase.
Mutant 1 is mutant for the CDC25 gene that encodes a phosphatase.
Mutant 1 is mutant for the wee1 gene that encodes a phosphatase.
Mutant 1 is mutant for the wee1 gene that encodes an inhibiting kinase.