Gene Flow
Gene Flow - Related Videos
03:27
Gene Flow
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2026
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals. This phenomenon plays a significant evolutionary role in all organisms, and depending on the rates of gene flow, the mechanism either induces genetic diversity or generates genetic homogeneity among populations. When the rate of gene flow is low, the introduction of new alleles into a population generates genetic diversity. On the other hand, a high rate of...
01:09
Mutation, Gene Flow, and Genetic Drift
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2026
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...
08:11
Analysis of Gene Function and Visualization of Cilia-Generated Fluid Flow in Kupffer's Vesicle
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Cited by 19 •
2013
Cilia-generated fluid flow in Kupffer’s Vesicle (KV) controls left-right patterning of the zebrafish embryo. Here, we describe a technique to modulate gene function specifically in KV cells. In addition, we show how to deliver fluorescent beads into KV to visualize fluid flow.
08:51
Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
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Cited by 9 •
2013
A protocol for nanoparticle tracking analysis (NTA) and high-throughput flow cytometry to evaluate polymeric gene delivery nanoparticles is described. NTA is utilized to characterize the nanoparticle particle size distribution and the plasmid per particle distribution. High-throughput flow cytometry enables quantitative transfection efficacy evaluation for a library of gene delivery biomaterials.
10:43
Flow Cytometry Purification of Mouse Meiotic Cells
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Cited by 65 •
2011
An efficient method to obtain highly purified viable meiotic fractions from mouse testis is described, which combines a refined cell dissociation protocol with fluorescent activated cell sorting (FACS). This method takes advantage of differences in the DNA content and nuclear density of discrete meiotic fractions.
FAQs
Migration alone does not change a recipient population’s gene pool; the arriving individual or gamete must reproduce there and pass an inherited variant to offspring. This condition distinguishes a biologically meaningful transfer from movement that leaves no genetic contribution. Tracking reproduction therefore helps explain when allele frequencies actually shift.
Gene flow can produce a paired pattern: genetic diversity may rise within a population while genetic differences between populations decline. The same transferred variants that add alternatives to one gene pool can also make separate gene pools more alike. This pattern helps researchers recognize gene flow’s contribution to population structure and evolutionary change.
By moving inherited variants into a new population, gene flow can introduce traits that were not previously present there. Those traits may be beneficial or harmful, so their movement can alter how researchers interpret adaptation and the distribution of characteristics across connected populations over time.
Patterns in allele frequencies can help researchers examine whether populations remain genetically distinct or share inherited variation. These observations contribute to interpreting population structure and speciation, because they show how genetic exchange relates to similarities and differences among populations. The same evidence also supports broader explanations of evolutionary change in biology.
In fragmented habitats, conservation strategies can use gene flow as an indicator of connectivity and genetic health. Maintaining connections between populations may support the movement of inherited variants, helping preserve variation within populations and limit increasing genetic differences. This makes gene flow relevant when evaluating how fragmentation affects biological populations.
A basic assessment focuses on allele frequencies in multiple populations and on how similar or different their gene pools are. Researchers then interpret increases in within-population variation or reduced differences between populations as evidence relevant to gene flow. This approach connects genetic observations with population structure, adaptation, and conservation questions.