The graph below is a computer simulation run on the same population of 2,000 flies looking at the dominant allele frequency over generations. Each line represents one round of the simulation that tracked the fly population through 2000 generations. A fly generation lasts 10 days. Y axis- Dominant Allele frequency Genetic Drift 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 1000 Time (generations] 500 1500 2000 Allele frequencies

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.