Genetic Variation

Genetic variation, variation in alleles of genes, occurs both within and among populations. Genetic variation is important because it provides the “raw material” for natural selection. Genetic variation is brought about by mutation, which is a permanent change in the chemical structure of a gene. Polyploidy is an example of chromosomal mutation. Polyploidy is a condition wherein organisms have three or more sets of genetic variation (3n or more).

Read more about Genetic VariationAmong Individuals Within A Population, Between Populations, Measurement, Sources, Maintenance in Populations

Other articles related to "genetic variation, genetic, variation":

Microevolution - The Four Processes - Gene Flow
... allele frequencies, as well as introducing genetic variation into a population ... Immigration may add new genetic material to the established gene pool of a population ... Conversely, emigration may remove genetic material ...
Genetic Variation - Maintenance in Populations
... A variety of factors maintain genetic variation in populations ... Natural selection can also maintain genetic variation in balanced polymorphisms ...
Guido Barbujani - Works
... by training, has been working on several aspects of human genetic variation ... His analyses of geographic patterns of genetic variation in Europe support Luca Cavalli-Sforza's Neolithic demic diffusion model, i.e ... for most of the existing patterns of genetic variation ...
Human Genetic Variation - Genetic Variation
... Genetic variation - variation in the alleles of genes - occurs both within and among populations ... Since genetic variation provides the "raw material" for natural selection, it is important ...
Marshallia Mohrii - Conservation - Threats
... from each other, and members of differing populations cannot interact, the genetic variation within populations starts to decrease ... able to interact for many generations, a loss of genetic diversity with populations, and the species as a whole become a very real problem ... Luckily, habitat fragmentation and a lack of genetic variation is not a problem for Mohr’s Barbara Button, as the species has more variation than most others in its environment ...

Famous quotes containing the word genetic:

    What strikes many twin researchers now is not how much identical twins are alike, but rather how different they are, given the same genetic makeup....Multiples don’t walk around in lockstep, talking in unison, thinking identical thoughts. The bond for normal twins, whether they are identical or fraternal, is based on how they, as individuals who are keenly aware of the differences between them, learn to relate to one another.
    Pamela Patrick Novotny (20th century)