LIFE SCIENCE

Detailed explanation-1: -Genetic variation is a prerequisite to evolutionary change. In the absence of such variation, no subsequent change can be achieved. Genetic variation is ultimately all generated by mutation. It is therefore clear that mutation is a major evolutionary force that must be studied and understood to understand evolution.

Detailed explanation-2: -Mutations are one of the fundamental forces of evolution because they fuel the variability in populations and thus enable evolutionary change.

Detailed explanation-3: -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.

Detailed explanation-4: -Mutations are essential for evolution to occur because they increase genetic variation and the potential for individuals to differ. The majority of mutations are neutral in their effects on the organisms in which they occur. Beneficial mutations may become more common through natural selection.