NEET BIOLOGY

Detailed explanation-1: -Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.

Detailed explanation-2: -Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism.

Detailed explanation-3: -Mutation Generates New Alleles Mutation creates slightly different versions of the same genes, called alleles. These small differences in DNA sequence make every individual unique.

Detailed explanation-4: -A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.

Detailed explanation-5: -Evolutionary biologists often define ‘evolution’ as any change in a population’s genetic composition over time.