Answer :
Final answer:
The generation-to-generation change in the allele frequencies in a population is known as evolution. Changes can also be driven by genetic drift, which is the effect of chance on the frequencies. Overall, natural selection, genetic drift, and other processes can lead to significant changes in a population's genetic makeup over time.
Explanation:
The generation-to-generation change in the allele frequencies in a population is referred to as evolution. This idea is rooted in population genetics where evolution is defined as a change in the frequency of an allele within a population. For instance, if we take the ABO blood type system as an example, the frequency of one of the alleles, IA, is determined by the number of copies of that allele divided by all the copies of the ABO gene present in the population.
Another phenomenon that can lead to changes in allele frequency is known as genetic drift, which happens by chance. For example, some individuals might have more offspring than others, not because of their genetically encoded traits, but due to chance (being in the right place at the right time). As such, changes in allele frequencies can occur randomly without any advantage to the population over existing allele frequencies. This illustrates that natural selection, genetic drift, and other effects like the founder effect, can lead to significant changes in the population's genetic makeup over time.
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Answer:
Genetic drift
Explanation:
change in allele frequencies in a population from generation to generation that occurs due to chance events
