LIFE SCIENCE

Detailed explanation-1: -Mutation is the ultimate source of all genetic variation, and is essential for evolution by natural selection: indeed, most of our genome has been shaped primarily by mutation and random drift.

Detailed explanation-2: -Mutations are changes in the genetic sequence, and they are a main cause of diversity among organisms.

Detailed explanation-3: -Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.

Detailed explanation-4: -The genetic diversity has three different sources: mutation, recombination and immigration of genes.

Detailed explanation-5: -The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Recombination also can create a new DNA sequence (a new allele) for a specific gene through intragenic recombination.