31. The Fitzgeralds found themselves victims of " genetic drift , " a relatively new and disturbing phenomenon. 32. Isolation can induce allopatric speciation usually through genetic drift , and different environments induce different evolutionary pressures. 33. Genetic drift refers to random effects resulting from chance variation in the genes, environment, or development.34. Due to genetic drift , they are a separate species from either baseline humans or mutant humans. 35. The precise role of, say, genetic drift in this process thus is largely speculative at present. 36. This process seems to be dominated by genetic drift resulting from small selection for smaller genomes. 37. Variation mechanisms such as mutations, genetic drift , and genetic flow have been studied and documented thoroughly. 38. However, the isolated populations are also affected by genetic drift resulting in a decline in their societies. 39. First, smaller ( founder ) populations experience greater genetic drift because of increased fluctuations in neutral polymorphisms. 40. Genetic drift will result in them having different allele proportions from the population they split off from.
