Population genetics is the study of the allele frequency distribution and change under the influence of the four evolutionary forces: natural selection, genetic drift, mutation and gene flow.
Population
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population
noun
1. people inhabiting a territory, as in American population ...
Part of the work of forensic DNA analysis is the creation of population databases for the STR loci studied.
Population Genomics
Population genomics is the application of genomic technologies to understand populations of organisms.
Population Cycles
Some populations go through repeated and regular periods of boom followed by bust.
A population that is closed to genetic material from the outside.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Populations Transition Between Growth and Stability
Limits on population growth can include food supply, space, and complex interactions with other physical and biological factors (including other species).
Population Genetics
Speakers presented work on characterizing extant haplotypes and developing maps describing typical distances up to which allelic variants can be expected to be in linkage disequilibrium.
Populations of living things evolve
Evolution refers to changes in the genetic composition of a population. Genetic changes may result in changes in the physical or behavioral characteristics of the individuals.
Population: A group of individuals of the same species within a given space and time.
Predaceous: Preying upon other organisms, predatory.
population bottleneck
Type of genetic drift that occurs as the result of a population being drastically reduced in numbers by an event having little to do with the usual forces of natural selection.
population density ...
population dynamics The study of the factors that affect the growth, stability, and decline of populations, as well as the interactions of those factors.
Population. A local group of organisms belonging to the same species and capable of interbreeding.
PPA. See U.S. Department of Agriculture.
Prion. See Proteinaceous infectious particle.
Population: The number of individuals of a particular species that live within a defined area.
Predator: An animal that hunts and kills other animals for food.
Prey: An animal that is used by other animals for food.
Population a group of the same species of organism in the same area at the same time
(populus = the people)
Porphyria a dominant genetic inability to make porphyrin
(porphyr = purple; -ia = state of‚ condition of‚ disease) ...
Populations evolve. [evolution: a change in the gene pool] In order to understand evolution, it is necessary to view populations as a collection of individuals, each harboring a different set of traits.
Population genetics is basically genetics of the particular traits, or characters, of man, in the case of human population genetics, that then pass between generations with a particular population.
Population
A group of organisms of the same species relatively isolated from other groups of the same species. See deme.
Related Terms:
Species ...
Population density. Number of individuals per unit area or volume
Porifera. The phylum comprising the sponges.
Population Biology:
Population Biology
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Complete Biology:
Complete Biology ...
Population biology - study of the populations of organisms - most often referred as ecology, or used to point out biology adaptations, biology events sum up ...
population A group of organisms of the same species inhabiting a specific geographical locality.
population crash A sudden population decline caused by predation, waste accumulation, or resource depletion; also called a dieback.
In population genetics the evolution of a population of organisms is sometimes depicted as if travelling on a fitness landscape. The arrows indicate the preferred flow of a population on the landscape, and the points A, B, and C are local optima.
When a population of bacteria is subjected to an antibiotic, many bacteria are killed, but a few may have the ability to evade death. If so, this ability can be passed to later generations.
Effective population size (N or Ne): number of individuals contributing 'unique' chromosomes to the next generation (Nf = number of mothers in a population; ...
Clonal
A population of cells derived from a single cell and thus expected to be genetically identical. Genetic differences in a "clonal" population may arise from random spontaneous mutations during growth of the cells.
The total dry weight of all organisms in a particular sample, population, or area. Bioremediation. The use of microorganisms to remedy environmental problems. See Bioaugmentation, Bioenrichment. Biotechnology.
Genetic variation -- a phenotypic variance of a trait in a population attributed to genetic heterogeneity.
Community: A group of populations of different species occupying a given place at a given time that are viewed as interdependent. An aggregation of interacting species.
As with much other research in genetics, studies of genes and behavior require analysis of families and populations for comparison of those who have the trait in question with those who do not.
It comes about when sub populations of a species are separated geographically (geographical isolation) or are prevented from engaging in sexual reproduction (sexual isolation) and upon later reunion, they can no longer interbreed.
Differential displayA form of RT-PCR in which primers are used to select a subset of the total mRNA population. This allows comparison of mRNAs from different cells.
Though widespread familiarity with the flu makes it seem relatively benign to much of the general population, the virus can be devastating.
Within a population, the measure of how much of the variation of a particular phenotype is due to environmental factors (as opposed to variations in genotype - see genetic variance).
This it is a very important task because we are able to know the behavior or functioning of each population when it faces to other individuals from other populations or communities and how the populations or the specific sectors of the biosphere are ...
selection -- Process which favors one feature of organisms in a population over another feature found in the population.
The interaction between populations in which one organism (the predator) consumes another (the prey).
Polymorphism Genetic variation occurring in a population so that at least two alleles are present at a frequency of 1% or gretaer.
- The movement of genes from one population to another by way of interbreeding of individuals in the two populations
Gene mapping
- Determining the relative locations of genes on a chromosome.
control action threshold. Pest population level at which treatment is necessary to prevent economic loss, also called economic threshold.
cornicle. Two tubular structures located on the posterior part of an aphid's abdomen.
Gene flow: The exchange of genetic traits between populations by movement of individuals, gametes, or spores. It involves the spread of new variants among different populations through dispersal.
lethal dose (LD) - the amount of a substance that will produce a given mortality (i.e. 50% = LD50) to a population within a given time (usually 24 hours) under specific conditions when administered directly to the organisms; ...
Those organisms are removed from the population so that healthier animals can survive. But the virus life cycle, that of a parasite, only hurts the organisms. Some even destroy cells in order to reproduce.
Solution hybridization is designed to measure the levels of a specific mRNA species in a complex population of RNA.
Single base differences of DNA sequences between individuals of a population. For PCR screening and detection of SNP, please visit Primo SNP. See also PCR Glossary.
Other Resources
PubMed Google ...
Dynamic instability A property of microtubules such that some microtubules in a population lengthen while other simultaneously shorten; ...
Some drugs work well in some patient populations and not as well in others. Studying the genetic basis of patient response to therapeutics allows drug developers to more effectively design therapeutic treatments.
3. What would eventually happen to the population of the beans that "survived" the worst? Why?
the legal prohibition of movement of animals from a population with disease ...
Polymorphism: Difference in DNA sequence among individuals. Genetic variations occurring in more than 1% of a population would be considered useful polymorphisms for genetic linkage analysis. Compare mutation.
...
The measurements of the pelvis given above are fairly accurate, but different figures are given by various authors no doubt due mainly to differences in the physique and stature of the population from whom the measurements have been taken. [back] ...
Differs from polyclonal antibodies, which are mixed populations of antibody molecules such as may be present in a serum specimen, within which many different individual antibodies have different binding specificities.
spontaneous Mutations that occur in the absence of treatment with a chemical or biological mutagen. Usually refers to mutations in natural populations.
 See also: Organ, Human, Trans, DNA, Long
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