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Population in Biological Dictionary

Viability

... 2 meanings: Meaning #1 : (of living things) population viability The ability of a population to persist and to avoid extinction. ... This is called population viability analysis (PVA) and consists of ... ...

True-breeding

... gene frequency, the more true breeding the population is. ... All true - breeding Cannabis ... trying to make all ... A true - breeding population is one that contains only one allele for the ... selection will create a true - breeding pink population (Figure 9) ... Find Breeding's True Value ...

Random mating

... heritable ... Random Mating . In a population at equlibrium, mating must be random . ... individuals than you would expect in a population where mating is random . ... What is ... ... A summary of The Hardy-Weinberg Law in population Genetics. Learn exactly what happened in this ...

Population genetics

... population genetics is the study of the allele ... and gene flow. It also takes account of population subdivision and population structure ... ...

Population dynamics

... population dynamics is the branch of life sciences that ... processes influencing those changes. population dynamics deals with the way populations ... ... is an area with an associated fish or aquatic population which is harvested for its commercial or ...

Population

... In biology, a population is the collection of inter-breeding organisms of ... of human beings. Individuals within a population share a factor may be reduced by statistical ... This is a list of countries ordered according to population . The list includes sovereign states and ...

Phenotypic variance

... is the proportion of phenotypic variation in a population that is attributable to genetic variation ... 671 - 672) Phenotypic Mean and Variance of a population What is ... the proportion of the total phenotypic variance in a population that is due ... Additive genetic variance ...

Molecular evolution

... molecular biology, evolutionary biology and population genetics sought to understand ... The ... biodiversity, ... Nei, M. (1975) Molecular population Genetics and Evolution . ... Home" Education" ... integrated at organism and higher levels: population biology; ... The online version of Molecular ...

Microgametophyte

... produced by a tiny Microgametophyte population sizes and plant reproductive output in the insect ... We quantified microgametophyte population sizes and inferred pollen limitation ... ... ... It is the size of this microgametophyte population ... Each microspore divides by mitosis to ...

Metapopulation

... by Richard Levins in 1969 to describe a model of population dynamics of insect pests in agricultural fields, ... and human health risk analysis. ... distinct population in a metapopulation may be referred to ... ... is not the entire population, just the population within a set area. ... The metapopulation of ...

Linkage equilibrium

... In population genetics, linkage disequilibrium is the ... ) ( genetics ) The occurrence in a population ... Contrariwise, " linkage equilibrium " denotes the case D = 0. ... Home > population Genetics & Statistics ...

Linkage disequilibrium

... In population genetics, linkage disequilibrium is the ... ) ( genetics ) The occurrence in a population of certain combinations of linked alleles in ... measures the ... linkage disequilibrium = population wide measure of interlocus allelic associations ....

Genomic library

... A genomic library is a population of host bacteria, each of which carries a DNA ... DNA fragments that is stored and propagated in a population of micro-organisms through the process of ... free encyclopedia. A genomic library is a population of host bacteria, each of ... ... size (use ...

Genetic drift

... with which a gene variant (allele) occurs in a population due to random sampling and chance: the alleles ... population, presumably owing to chance rather population bottleneck ( ′päpyə′lāshən ′bädəl′nek ) ( ... occurs as a result of a drastic reduction in population by an One of the basic mechanisms of ...

Genetic diversity

... For Dogs ... Genetic diversity in a population means that the population ... Genetic diversity has been lost. ... ... The proportion of genetic diversity due to population subdivision rises from 1.6 ... Some take a ...

Gene pool

... In population genetics, a gene pool is the complete set of ... genetic information contained within a population of sexually reproducing ... gene All of the alleles in one population pools ... The Gene Pool is a Denver ...

Founder effect

... In population genetics, the founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of ... specific allele at one or more loci in a new population that arises from Founder effects . A ...

Eugenics

... qualities of the human species or a human population by such means as discouraging reproduction by ... ... Positive eugenics ' tried to encourage the population perceived as the "best and ... Crying Hands: ... Name of Eugenics ... Teaching on Eugenics , population Control, Abortion, Birth Control, Euthanasia, ...

Carrying capacity

... biological species in an environment is the population size of the species that the environment can ... of the Earth is 2 billion, they ... In population ecology , the carrying capacity is the population size at which ... Carrying capacity has also ...

Anagenesis

... the evolution of species involving an entire population rather than a branching event, as in cladogenesis. When enough mutations reach fixation in a population to significantly differentiate from an ancestral ... may be assigned. A key point is that the entire population is ... Aspects of the topic ...

Allele frequency

... which a gene variant ( allele ) occurs in a population due to random sampling and chance: the alleles ... are a random sample of those in ... In population genetics, allele frequencies show the ... ... Allele frequencies can change in a population over time, depending on the ' ... 7. Why is the ...

Adaptive peak

... peak in these other databases ... of the population toward a combination corresponding to an ... fitness peaks in the adaptive landscape, a population will ... and, consequently, forever climbing up ... adaptive peak , this principle means that the population mean ... Models for the movement of the peak ...

Inbreeding depression

... Inbreeding depression is reduced fitness in a given population as a result of breeding of related individuals. Breeding between closely ... you facts ... Inbreeding depression is reduced fitness in a given population as a result of ... Inbreeding depression may also manifest itself ...

Gene frequency

... the relative frequency with which a gene variant (allele) occurs in a population due to random sampling and chance: the alleles in offspring are a ... gene B and its allele b will not remain in Hardy-Weinberg ... In population genetics, allele frequencies show the genetic diversity of a ... ...

Gene flow

... In population genetics, gene flow is the transfer of alleles of genes from one population to another. This page is for work on the " Gene flow " ...

Antigenic variation

... antigenic profile may occur as the pathogen passes through a host population or may take place in the originally infected host. The strategy is ... ... A fundamental feature of antigenic variation is its link with the population ... Antigenic variation is orchestrated by epigenetic factors ......

Weed

... or agricultural areas, but also in ... Weed is a city located in Siskiyou County, California. As of the 2000 Census, the town had a total population of 2,978. There are several unincorporated communities adjacent to, or just outside Weed proper. These ... Things to do and see, ...

Transcriptome

... The transcriptome is the set of all messenger RNA (mRNA) molecules, or "transcripts," produced in one or a population of cells. The term can be applied to the total set of transcripts in a given organism, or to the specific subset of transcripts present in a ...

Subcloning

... <I> ... The GPS&trade;-1 Genome Priming System provides a simple <I>in vitro</I> method for generating a population of ... walking, random subcloning and nested ... One of the most common steps in a molecular cloning experiment is subcloning . ... The ...

Spermatogonia

... Apr spermatogonia further divide to become chains of 4, 8, 16, or 32 Aal ... One or two divisions of spermatogonia occur to maintain their population in a ... Spermatogonia proliferate several times and undergo 1 to 5 stages of division ... What is spermatogonia ? Meaning of spermatogonia ...

Speciation

... (or more) reproductively ... There are different modes of speciation that can lead to the origin of species. ... The size and remoteness of a population also play a major role in speciation . ... Darwin believed that speciation was the ultimate ... has dominated speciation theory. ... ...

Shotgun method

... Bio Program College Genetics Degree ... Scan: ==> Shotgun - method News ... Employing a " shotgun method " Hansen derives approximate population figures and ... The Shotgun Method is a rigorous evaluation of data that puts antiquity in a new ... Shotgun sequencing In genetics , ...

Sequence Polymorphism

... Polymorphism in biology occurs when two or more clearly different phenotypes exist in the same population of a species — in other words, the occurrence of more than one form or morph. In order to be classified as such, ... In 1985, Sir Alec ...

Selection

... is the process by which heritable traits that make it more likely for an organism to survive and successfully reproduce become more common in a population over successive generations. It is a key ... ... we wish to work is making a selection . ... · Making a Selection - Use the mouse ...

Segregating

... fied components. ... Thus, in families segregating an inactive copy of ... that QTL were segregating on regions of chromosomes ... using a population of mice segregating the high growth ... Nearly four decades after this rural Georgia county stopped segregating its schools by race, it wants ...

Screening

... Screening , in medicine, is a strategy used in a population to detect a disease in individuals without signs or symptoms of that disease. Unlike most medicine, in screening , tests are performed on those ...

RAPD

... a result of ... RAPD requires minute quantities of DNA for detection of polymorphism based on ... RAPD analysis showed that the Chilanshan population had higher genetic diversity ... RAPD markers are based on the amplification of unknown DNA sequences using ... The RAPD (random ...

Quantitative trait loci

... quantitative trait loci . From Wikipedia, the free encyclopedia ... Heritability · Quantitative trait locus · Candidate gene · Effective population size ... The nature and identification of quantitative trait loci . a community's view ... Quantitative trait loci (QTLs) can be ...

Pulmonary vein

... of ... Pulmonary vein stenosis is a fascinating yet frustrating and difficult to manage ... Pulmonary vein stenosis in the adult population is even more rare, and the small ... ... the vein wall or perivascular tissue, or embolize into the pulmonary circulation. ... in upper limb ...

Polymorphic loci

... scientists have tried to ... Therefore, for any polymorphic locus , one of the alleles is from the mother and ... Genetic studies in 5 Greek population samples using 12 highly polymorphic DNA loci from Human Biology provided by Find Articles at BNET Multiple Polymorphic Loci for Molecular ...
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