Ginny genestudy performs the following experiment. she wants to replicate a test strand of dna using wildtype of saccharomyces cerevisiae (budding yeast) and two mutants which she calls poor-rep1 and poor-rep2. she performs the experiment with her wildtype strain, and her test dna strand replicates perfectly. she does the same experiment with poor rep-1 and discovers that this strain can only synthesize the dna strand if she adds a purified wildtype dna polymerase-a exogenously. when she performs the experiment with poor rep-2 she discovers that adding wildtype dna polymerase-a has no effect. which of the following scenarios is a possibility for the poor rep-1 and poor rep-2 strains.