Population

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. Full article ...

Population Activities Unit of the United Nations Economic Commission for Europe. Promoting policy dialogues among the UNECE Member States on various facets of demographic change in Europe and North America. Underpopulation? MercatorNet ...

population noun 1. people inhabiting a territory, as in American population ...

1. in ecology, the number of individuals of a population per unit of living space 2. in cell culture or tissue culture, the number of cells per unit area or volume 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 ...

Population genetics is the study of the distribution of and change in allele frequencies under the influence of the four evolutionary forces: natural selection, genetic drift, mutation and migration.

Population Cycles The Carrying Capacity of the Environment r-Strategists and K-Strategists Population Density and Shifts in Strategy ...

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 ECOLOGY Table of Contents In previous chapters/units we have concentrated on the biology of the individual cell, tissue, and organism. There are levels of organization above the individual organism that will be the subject of this unit.

Population A group of organisms of the same species relatively isolated from other groups of the same species. See deme.

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.

Population density. Number of individuals per unit area or volume Porifera. The phylum comprising the sponges.

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.

Populations are replacing each other all the time. There is a tendency for environments to change rather rapidly, entailing the displacement of animal populations of species from one environment to another, ...

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 Biology: Population Biology bol.ch - Das einfach runde Partnerprogramm Complete Biology: Complete Biology ...

population genetics The branch of genetics that deals with frequencies of alleles and genotypes in breeding populations. cf. quantitative genetics. population A local group of organisms belonging to the same species and interbreeding.

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 genetics The study of variation in genes among a group of individuals. Positional cloning ...

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.

Population a group of the same species of organism in the same area at the same time (populus = the people) ...

c. Population Ecology Define different types of population growth. Analyze factors that affect population size.

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.

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.

Testing a population group to identify a subset of individuals at high risk for having or transmitting a specific genetic disorder. explained: Listen to a detailed explanation.

Effective population size (N or Ne): number of individuals contributing 'unique' chromosomes to the next generation (Nf = number of mothers in a population; ...

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.

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.

Pharmacogenomics is the study of the stratification of the pharmacological response to a drug by a population based on the genetic variation of that population.

Differential display A 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.

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).

Eugenics: Deliberate manipulation of the genetic makeup of human populations, traditionally by selective birth control, infanticide, mass murder, genocide.

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.

Solution hybridization is designed to measure the levels of a specific mRNA species in a complex population of RNA.

To be called a polymorphism, a variant should be present in a significant number of people in the population. Genetic variations occurring in more than 1% of a population would be considered useful polymorphisms for genetic linkage analysis.

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 ...

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.

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.

Genetic variations occurring in more than 1% of a population would be considered useful polymorphisms for genetic linkage analysis. Compare mutation. Predisposition Intrinsic likelyhood of developing a particular disorder.

polymorphic Describing a protein for which amino acid sequence variants exist in a population of organisms, but the variations do not destroy the protein's function. For example, antibodies which contain variable and hypervariable sites.

See also: Organ, Human, Trans, DNA, Species