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Genetic variability is either the presence of, or the generation of, genetic differences. It is defined as "the formation of individuals differing in genotype , or the presence of genotypically different individuals, in contrast to environmentally induced differences which, as a rule, cause only temporary, nonheritable changes of the phenotype ."
Genetic variation can be identified at many levels. Identifying genetic variation is possible from observations of phenotypic variation in either quantitative traits (traits that vary continuously and are coded for by many genes, e.g., leg length in dogs) or discrete traits (traits that fall into discrete categories and are coded for by one or a few genes, e.g., white, pink, or red petal color ...
The study of human genetic variation has evolutionary significance and medical applications. It can help scientists reconstruct and understand patterns of past human migration. In medicine, study of human genetic variation may be important because some disease-causing alleles occur more often in certain population groups.
Genetic variance has three major components: the additive genetic variance, dominance variance, and epistatic variance. [3] Additive genetic variance involves the inheritance of a particular allele from your parent and this allele's independent effect on the specific phenotype, which will cause the phenotype deviation from the mean phenotype.
The Human Genome Project and The Human Variome Project are examples of large scale studies of the entire human population to collect data which can be analyzed to understand genomic and genetic variation in individuals, respectively. The Human Genome Project is the largest scientific project in the history of biology.
Genetic diversity is the total amount of genetic variability within a species. It can be measured in several ways, including: observed heterozygosity , expected heterozygosity, the mean number of alleles per locus , the percentage of loci that are polymorphic , and estimated effective population size .
Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. It ranges widely, from the number of species to differences within species, and can be correlated to the span of survival for a species. [1] It is distinguished from genetic variability, which describes the tendency of genetic characteristics to ...
Genetic variability is similar to, though distinct from, genetic diversity. genetic variation. Sometimes used interchangeably with genetic diversity and genetic variability. The genetic differences both within and between populations, species, or other groups of organisms. It is often visualized as the variety of different alleles in the gene ...