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Related Concept Videos

Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Cell Migration

Cell Migration

Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.

Cell Migration

Cell Migration

Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.

Mutation, Gene Flow, and Genetic Drift

Mutation, Gene Flow, and Genetic Drift

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).

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

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Related Experiment Video

Updated: Dec 5, 2025

A Simple Migration/Invasion Workflow Using an Automated Live-cell Imager

A Simple Migration/Invasion Workflow Using an Automated Live-cell Imager

Published on: February 2, 2019

Immigration in science.

Jean-Laurent Casanova¹, David M Holtzman², Susan M Kaech³

¹The Rockefeller University, New York, NY.

The Journal of Experimental Medicine

|October 15, 2020

Summary

This summary is machine-generated.

Immigrant scientists are crucial to US scientific advancement, contributing significantly to Nobel Prizes and faculty positions. New immigration policies threaten this vital contribution and the ability of US labs to attract top global talent.

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Human T Lymphocyte Isolation, Culture and Analysis of Migration In Vitro

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Human T Lymphocyte Isolation, Culture and Analysis of Migration In Vitro

Human T Lymphocyte Isolation, Culture and Analysis of Migration In Vitro

Published on: June 1, 2010

Area of Science:

Science and Technology Policy
Immigration Studies
Scientific Collaboration

Background:

Scientific progress relies heavily on international collaboration.
Immigrants constitute a significant portion of US Nobel laureates, postdocs, and science/engineering faculty.
Recent US immigration policies raise concerns among scientists and research institutions.

Purpose of the Study:

To highlight the contributions of immigrant scientists to the US scientific enterprise.
To share firsthand experiences of immigration within the scientific community.
To address concerns regarding the impact of immigration policies on scientific talent acquisition.

Main Methods:

Collection of personal accounts from immigrant and non-immigrant scientists on the editorial board.
Sharing firsthand perspectives on immigrating to the US.
Reflections on the impact of immigration on scientific laboratories.

Main Results:

Over 40% of American Nobel Prize winners are immigrants.
Foreign-born individuals comprise 49% of US postdocs and 29% of science and engineering faculty.
Personal narratives illustrate the profound impact of immigration on scientific careers and research environments.

Conclusions:

Immigration is integral to the success and advancement of science in the US.
Restrictive policies pose a risk to the US's ability to attract and retain global scientific talent.
Celebrating and understanding the experiences of immigrant scientists is essential for fostering a robust scientific community.