Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The movement or spread of alleles of one species into the gene pool of another through repeated backcrossing of interspecific hybrids with members of one of the parental species.

from The Century Dictionary.

  • noun The act of going in or of proceeding inward; entrance.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act of going in; entrance.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun genetics The movement of a gene from one species to another

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From Latin intrōgressus, past participle of intrōgredī, to step in : intrō-, intro- + gradī, to step; see ghredh- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

introgress +‎ -ion

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Examples

  • The result was an "introgression" of Neanderthal alleles into the human lineage.

    Last-Minute Changes 2009

  • So it's still "far out," Harpending admits, but civilization could have gotten its start in an act of "introgression" with another species.

    Evolution: Who Gave Us Our Smarts? 2007

  • Whatever that allele does, it must have conveyed a very strong evolutionary advantage, because from that single event of what geneticists politely call "introgression" it spread to 70 percent of the human population today.

    Evolution: Who Gave Us Our Smarts? 2007

  • Whatever that allele does, it must have conveyed a very strong evolutionary advantage, because from that single event of what geneticists politely call "introgression" it spread to 70 percent of the human population today.

    Periscope 2007

  • For archaic humans, there is no test of the strength or permeability of boundaries between populations; it is common to use the term "introgression" to describe gene flow in such situations, even if such gene flow is fairly common.

    "So what did Neanderthal women do all day?" Ann Althouse 2006

  • Variation is spread across a mean, and they show that variance depends on the natural cycling of environmental conditions, heritability, introgression, and balancing selection.

    Biomolecular Networks 2009

  • This evidence seems to indicate that some low level of introgression of Neanderthal genes happened in Europe after modern humans started coming out of Africa and before they colonized the rest of the world.

    Modern humans may have inherited some Neanderthal genes - The Panda's Thumb 2010

  • This evidence seems to indicate that some low level of introgression of Neanderthal genes happened in Europe after modern humans started coming out of Africa and before they colonized the rest of the world.

    Modern humans may have inherited some Neanderthal genes - The Panda's Thumb 2010

  • This evidence seems to indicate that some low level of introgression of Neanderthal genes happened in Europe after modern humans started coming out of Africa and before they colonized the rest of the world.

    Modern humans may have inherited some Neanderthal genes - The Panda's Thumb 2010

  • Quantifying Neanderthal introgression by serial co...

    Neanderbabies Kosmo 2009

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