genetic drift

noun

: random changes in gene frequency especially in small populations when leading to preservation or extinction of particular genes

Examples of genetic drift in a Sentence

Recent Examples on the Web But genetic drift works to preserve mutations across generations. Paul Smaglik, Discover Magazine, 27 June 2024 And in small populations, genetic drift is more influential than many people realize. Quanta Magazine, 2 May 2024 In large populations, the effects of genetic drift are minimal. Quanta Magazine, 2 May 2024 One of them is genetic drift, which introduces random shifts in genetic variation across generations. Quanta Magazine, 2 May 2024 But in species with smaller effective population sizes, natural selection gets weaker because genetic drift — the effect of pure chance on the spread of a mutation — gets stronger. Yasemin Saplakoglu, Quanta Magazine, 5 Apr. 2023 Dogs were also chosen because breeding practices over the past two centuries led to what scientists call genetic drift, or a loss of genetic diversity within specific breeds. Emilie Le Beau Lucchesi, Discover Magazine, 21 Feb. 2022 Random genetic drift may seem an odd candidate for a parameter removing variation, but recall that allele frequencies which reaches zero or 100 percent result in loci which are not polymorphic and will remain in that state barring new variation such as mutation or migration. Razib Khan, Discover Magazine, 17 Sep. 2013 The magnitude of genetic drift as a frequency is inversely proportional to population size. Razib Khan, Discover Magazine, 13 Sep. 2012

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Word History

First Known Use

1945, in the meaning defined above

Time Traveler
The first known use of genetic drift was in 1945

Dictionary Entries Near genetic drift

Cite this Entry

“Genetic drift.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/genetic%20drift. Accessed 15 Jul. 2024.

Medical Definition

genetic drift

noun
: random changes in gene frequency especially in small populations when leading to preservation or extinction of particular genes

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