Mutation and genetic drift are two very different kinds of genetic events, though they both influence the genetic qualities of future generations. Mutations are sudden, spontaneous, and permanent changes to the DNA sequence in a gene. Mutations are harmful if they decrease the fitness of the organism, and beneficial if the mutation increases fitness of the organism. Genetic drift, on the other hand, is the change in the genetic composition of a population as a result of such random events as storms. Genetic drift refers to the generation that survives to reproduce, which is often a matter of luck, not fitness. Still, such random occurrences influence a population’s genetic makeup.

Mutation and genetic drift are two very different kinds of genetic events, though they both influence the genetic qualities of future generations. Mutations are sudden, spontaneous, and permanent changes to the DNA sequence in a gene. Mutations are harmful if they decrease the fitness of the organism, and beneficial if the mutation increases fitness of the organism. Genetic drift, on the other hand, is the change in the genetic composition of a population as a result of such random events as storms. Genetic drift refers to the generation that survives to reproduce, which is often a matter of luck, not fitness. Still, such random occurrences influence a population’s genetic makeup.