NEET BIOLOGY

Detailed explanation-1: -variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

Detailed explanation-2: -Variation can be defined as any difference between the individuals in a species or groups of organisms of any species. mutation is the ultimate source of genetic variation, but mechanisms such as sexual reproduction and gene flow contribute to it as well.

Detailed explanation-3: -Between any two humans, the amount of genetic variation-biochemical individuality-is about . 1 percent. This means that about one base pair out of every 1, 000 will be different between any two individuals.

Detailed explanation-4: -In his work, Darwin recognized that all living things have trait differences or variations. Today we know that individual members of all species exhibit trait variations.

Detailed explanation-5: -Genetic variation is the presence of differences in sequences of genes between individual organisms of a species. It enables natural selection, one of the primary forces driving the evolution of life.