Genetic Diversity

Genetic diversity, the level of biodiversity, refers to the total number of genetic characteristics in the genetic makeup of a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.

Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess variations of alleles that are suited for the environment. Those individuals are more likely to survive to produce offspring bearing that allele. The population will continue for more generations because of the success of these individuals.

The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions. Diversifying selection is the hypothesis that two subpopulations of a species live in different environments that select for different alleles at a particular locus. This may occur, for instance, if a species has a large range relative to the mobility of individuals within it. Frequency-dependent selection is the hypothesis that as alleles become more common, they become more vulnerable. This in host-pathogen interactions, where a high frequency of a defensive allele among the host means that it is more likely that a pathogen will spread if it is able to overcome that allele.

Read more about Genetic DiversityImportance of Genetic Diversity, Survival and Adaptation, Agricultural Relevance, Coping With Poor Genetic Diversity, Measures of Genetic Diversity, Other Measures of Diversity

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Colony Collapse Disorder - Possible Causes - Selective Commercial Breeding and Lost Genetic Diversity in Industrial Apiculture
... reproduction of wild bees is a complex and highly selective process, leading to a diverse genetic makeup in large populations of bees, both within and between colonies ... Genetic diversity through sexual reproduction is a significant evolutionary factor in resistance to parasites and infectious diseases ... domestic and agricultural species, suffer from lack of genetic variation, resulting in increased risk of hereditable diseases, loss of vitality or vigour, and heightened uniform susceptibility ...
Madia Gond - Research Studies - Genetic Diversity
... A Microsatellite diversity was analysed in Gondi language speaking Madia Gonds of Maharashtra and three other Marathi speaking Proto – Australoid tribal groups, to understand their ... that Gondi tribes comprising the Madia-Gond, a hunter-gatherer population, harbour lower diversity than Marathi tribal groups, which are culturally and ... The populations showed genetic and linguistic similarity, barring a few groups with varied migratory histories ...
Conservation Genetics - Genetic Diversity
... Genetic diversity is the variability of genes in a species ... It can be estimated by the mean levels of heterozygosity in a population, the mean number of alleles per locus, or the percentage of polymorphic loci ...
Genetic Diversity - Other Measures of Diversity
... Alternatively, other types of diversity may be assessed for organisms taxonomic diversity ecological diversity morphological diversity Degeneracy There are broad correlations between different types of diversity ... example, there is a close link between vertebrate taxonomic and ecological diversity ...
American Livestock Breeds Conservancy - History and Organization
... on preserving rare breeds of livestock and promoting genetic diversity among livestock breeds, and remains the preeminent organization in this field in the United ... "the most comprehensive assessment of livestock genetic resources ever conducted in the United States" ... Its mission is to protect "genetic diversity in livestock and poultry species through the conservation and promotion of endangered breeds." The ALBC organizes and participates in ...

Famous quotes containing the words diversity and/or genetic:

    The diversity in the faculties of men, from which the rights of property originate, is not less an insuperable obstacle to a uniformity of interests. The protection of these faculties is the first object of government.
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