Variation

transgressive variation
the production of offspring with phenotypes that exceed the parental extremes
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
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Variation measured on a continuum (eg height in human beings) rather than in discrete units or categories. See continuous variation.
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Blind Variation and Selective Retention, or BVSR for short, is a principle from cybernetics describing change in evolutionary systems. BVSR is better known as the core concept of the theory of evolution.
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Variation Within and Among Human Populations
At the DNA level, humans are both very similar to and very different from one another. On average, pairs of individual humans share 99.9 percent DNA sequence identity.
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Variation found in vegetative cells dividing mitotically in culture.
Related Terms: Mitosis ...
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Variation
For many traits that occur in a population, individuals are often not all identical.
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variation
Diversity among the members of a population. Variation among individuals can exist at many levels, including genetic, physiologic and behavioral.
vas deferens pl. vasa deferentia ...
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Variations in the temperature of human beings and some other animals
5.1
Variations from thermometer placement ...
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variation Differences among individuals of a group or species that cannot be ascribed to age, sex, or position in the life cycle.
Vas L. Duct or vessel.
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Variation
Since its inception, GDB has been a repository for polymorphism data, with more than 18,000 polymorphisms now in GDB.
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variation in the exact splice point and
the introduction of N nucleotides
both of which increase the diversity of CDR3.
Diversity comes at a price ...
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Variations in the temperature of man and some other animals
As stated above, the temperature of warm-blooded animals is maintained with but slight variation.
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Variation. Differences in the frequency of genes and traits among individual organisms within a population.
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The variation requires a cis-acting hix element at the borders of the invertable element and a trans-acting hin gene, which encodes a site-specific recombinase, called an invertase.
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Phase variation
A mechanism which results in variable expression of surface antigens. An example is the switch between H1 and H2 flagellar antigens by an invertable switch in Salmonella.
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Phase variation: Alternation in the type of flagellum produced by a bacterium.
Phenotype: The observable properties and physical characteristics of of a cell or an organism that is the result of its unique genotype.
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Genetic variations at the site where a restriction enzyme cuts a piece of DNA. Such variations affect the size of the resulting fragments. These sequences can be used as markers on physical maps and linkage maps. RFLP is also pronounced "rif" lip.
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Without variation (which arises from mutations of DNA molecules to produce new alleles) natural selection would have nothing on which to act. A population is a group of individuals living in the same geographical area and sharing a common gene pool.
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Genetic Variation
Evolution requires genetic variation. If there were no dark moths, the population could not have evolved from mostly light to mostly dark.
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: A known variation (version) of a particular gene.
Formerly called allelomorph.
Allelic association
: see
linkage disequilibrium
.
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POLYMORPHISM - Variation within a DNA or RNA sequence.
POLYNUCLEOTIDE KINASE - Enzyme which catalyzes the transfer of the terminal phosphate of ATP to 5' hydroxyl termini of polynucleotides, either DNAor RNA. Usually derived from T4 bacteriophage.
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Random variation in gene frequency from one generation to another. Genetic engineering. The manipulation of an organism's genetic endowment by introducing or eliminating specific genes through modern molecular biology techniques.
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Genetic variation -- a phenotypic variance of a trait in a population attributed to genetic heterogeneity.
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Biodiversity: The total variation in life, including the number of species, the degree of genetic variation within species, the different types of ecosystems, and the all ecosystem functions.
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restriction fragment length polymorphisms (RFLPs) Variations, among individuals in a population, in the length of certain restriction fragments within which certain genomic sequences occur.
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The finding that APOE (the gene encoding apolipoprotein E) polymorphic variation was associated with an altered risk of developing Alzheimer's disease (AD) was a significant advance and immediately prompted a search for the mechanisms responsible for ...
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Genetics is the science of genes, heredity, and the variation of organisms. In modern research, genetics provides important tools in the investigation of the function of a particular gene, e.g. analysis of genetic interactions.
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Restriction fragment length polymorphisms (RFLP) are variation in DNA fragment banding patterns of electrophoresed restriction digests of DNA from different individuals of a species.
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diversity -- Term used to describe numbers of taxa, or variation in morphology.
DNA -- "deoxyribonucleic acid". The nucleic acid which carries the genetic code of an organism. It is the primary component of chromosomes. MORE?
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Explain why increased genetic variation is advantageous.
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Labs (variation, forks and beans/ adaptation; camouflage/NS) ...
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natural selection: the concept that random, small variations take place in living things that lead to the gradual development of a species.
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Any warm-blooded animal (mammal or bird that can maintain its body temperature within a narrow range, usually above that of its surroundings despite large variations in environmental temperature.
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Polymorphism
The occurrence of more than one form of, for example, a DNA sequence, type of protein or morphological trait in a group of organisms, revealing underlying genetic variation in the population.
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