A DNA triplet reads ATT. what is its corresponding mRNA codon? 1. ATT
2. TAA
3. UAA
4. AUU

Gene flow and genetic drift both affect allele frequencies in a population. a high level of gene flow into a population genetic diversity in a population. a high level of gene flow out of a population genetic diversity in a population. genetic drift is the change in allele frequencies due to factors. typically, genetic drift has the biggest impact on populations.