It is clear that the effects of evolution are felt by individuals, but it is the population as a whole that actually evolves.
Evolution is simply change in frequencies of alleles in the gene pool of a population .
Which allele is inherited is determined by the genotypes of the parents and by luck. T his definition of evolution was developed largely as a result of independent work in the early 20th century by Godfrey Hardy, an English mathematician, and Wilhelm Weinberg, a German physician. Through mathematical modeling, they concluded that gene pool frequencies are inherently stable but that evolution should be expected in all populations virtually all of the time. They resolved this apparent paradox by analyzing the probable net effects of evolutionary mechanisms. 1. mutation is not occurring 2.