Some radioactive iodide salts of sodium, including [ 125I ]NaI and [ 131I ]NaI, have radiopharmaceutical uses, such as in the treatment of thyroid cancer and hyperthyroidism or as radiolabeling tracers in imaging (see).
Genetic drift is defined as the changing of the number of available alleles in a population by chance events. Also called allelic drift, this phenomenon is usually due to a very small gene pool or population size.
Genetic drift is more pronounced in small populations than in large ones ï Chance deviations from expected results (which cause genetic drift) occur whenever organisms engage in sexual reproduction ï Genetic drift usually leads to the loss of alleles and reduced genetic variability ï Population bottleneck: an evolutionary event that occurs when a ...