Which of the following are accurate statements about "muller's ratchet" (select all that apply) a. recombination among sexual genotypes is able to recover the fitter genotypes that have been lost by genetic drift. b. muller's ratchet is expected to have negligible effects on small populations c. the term "ratchet" is used because the accumulation of alleles is irreversible in small asexual populations d. because asexual individuals inherit the mutations of their ancestors, as well as new mutations, the frequency of the most-fit genotype gradually decreases over time until subject to stochastic extinction.