Chemical Mutagenesis and Genetic Variation
A bacterial population is exposed to a chemical mutagen that induces G-C to A-T transitions. After many generations of reproduction in the presence of this mutagen, which of the following outcomes would most directly contribute to the population’s survival?
A
Increased genetic variation leading to adaptive mutations
B
Decreased mutation rate through natural selection
C
Increased rate of homologous recombination
D
Horizontal gene transfer between resistant individuals
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