Genetic variation is a fact that a biological system – individual and population – is different over space. It is the base of the genetic variability of different biological systems in space.Genetic variation is based on the variation in alleles of genes in a gene pool.It occurs both within and among populations, supported by individual carriers of the variant genes.
1. (used with a sing. verb) The branch of biology that deals with heredity, especially the mechanisms of hereditary transmission and the variation of inherited characteristics among similar or related organisms. 2. (used with a pl. verb) The genetic constitution of an individual, group, or class. genetics. n. 1. (Biology) (functioning as singular) the branch of biology concerned with the study of heredity and variation in organisms. 2. (Biology) the genetic features and constitution of a single organism, species, or group. Genetics is the study of genes, heredity, and genetic variation in living organisms. It is generally considered a field of biology, but it intersects frequently with many of the life sciences and is strongly linked with the study of information systems.  Full Definition of GENETICS. 1. : a branch of biology that deals with the heredity and variation of organisms. 2. : the genetic makeup and phenomena of an organism, type, group, or condition. — ge·net·i·cist \-ˈne-tə-sist\ noun. ADVERTISEMENT.  1. (Biology) (functioning as singular) the branch of biology concerned with the study of heredity and variation in organisms. 2. (Biology) the genetic features and constitution of a single organism, species, or group. (dʒəˈnɛt ɪks). n. (used with a sing. 1. Biology. the science of heredity, studying resemblances and differences in related organisms and the mechanisms which explain these phenomena. 2. the genetic properties and phenomena of an organism. — geneticist, n. — genetic, adj. the branch of biology that studies heredity and variation in plants and animals. Genetic variation is a fact that a biological system – individual and population – is different over space. It is the base of the genetic variability of different biological systems in space. Genetic variation is based on the variation in alleles of genes in a gene pool. It occurs both within and among populations, supported by individual carriers of the variant genes. Genetic variation is brought about by random mutation, which is a permanent change in the chemical structure of a gene. By Regina Bailey. Definition: In genetic variation, the genes of organisms within a population change. Gene alleles determine distinct traits that can be passed on from parents to offspring. Gene variation is important to the process of natural selection. The genetic variations that arise in a population happen by chance, but the process of natural selection does not. Natural selection is the result of the interactions between genetic variations in a population and the environment. Genetic variation occurs mainly through DNA mutation, gene flow (movement of genes from one population to another) and sexual reproduction. 1. (used with a sing. verb) The branch of biology that deals with heredity, especially the mechanisms of hereditary transmission and the variation of inherited characteristics among similar or related organisms. 2. (used with a pl. verb) The genetic constitution of an individual, group, or class. 1. Biology. the science of heredity, studying resemblances and differences in related organisms and the mechanisms which explain these phenomena. 2. the genetic properties and phenomena of an organism. — geneticist, n. — genetic, adj. the branch of biology that studies heredity and variation in plants and animals. 1 Genetic variation is important in that it may provide alternative phenotypes which may respond to the environment in different ways. Genetic diversity in a population or species as a result of new gene combinations (e.g. crossing over of chromosomes), genetic mutations, genetic drift, etc. 3. Important in maintaining biodiversity among species. User Contributions / Comments: 1 
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