LIFE SCIENCE

Detailed explanation-1: -Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error).

Detailed explanation-2: -Mutation, a driving force of evolution, is a random change in an organism’s genetic makeup, which influences the population’s gene pool. It is a change in the nature of the DNA in one or more chromosomes.

Detailed explanation-3: -There are four key mechanisms that allow a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next. These are evolution by: mutation, genetic drift, natural selection, and gene flow.

Detailed explanation-4: -Mutation is a source of new alleles in a population, thus it leads to an increase in variation among the members of the population. Mutation is a change in the DNA sequence of the gene. An individual that has a mutated gene might have a different trait than other individuals in the population.

Detailed explanation-5: -gene flow, also called gene migration, the introduction of genetic material (by interbreeding) from one population of a species to another, thereby changing the composition of the gene pool of the receiving population.