You have carried out a genetic screen in s. pombe and identified a hypothetical recessive allele we'll call cdc252-. the phenotype of a haploid cdc252- strain is that cells are smaller than wild-type. you identify an allele we'll call cdc252d. haploid cdc252d strains produce cells with a larger size than wild-type cells. which of the following most likely describes the function of the cdc252+ gene? cdc252+ is a regulator of cell cycle progression. in this case, cdc252+ is an activator of cell cycle progression. cdc252+ is required for cell cycle progression, but is not likely to be a regulator of cell cycle progression. in this case, cdc252+ is an inhibitor of cell cycle progression. cdc25+ is required for cell cycle progression, but is not likely to be a regulator of cell cycle progression. in this case, cdc252+ is an activator of cell cycle progression. cdc252+ is a regulator of cell cycle progression. in this case, cdc252+ is an inhibitor of cell cycle progression. mcb 252