Definitions for founder effect
founder ef·fect

WiktionaryRate this definition:5.0 / 1 vote

1. founder effectnoun

   A lessening of genetic variation when the entire population in question descends from a small number of founders.

WikipediaRate this definition:0.0 / 0 votes

1. 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 individuals from a larger population. It was first fully outlined by Ernst Mayr in 1942, using existing theoretical work by those such as Sewall Wright. As a result of the loss of genetic variation, the new population may be distinctively different, both genotypically and phenotypically, from the parent population from which it is derived. In extreme cases, the founder effect is thought to lead to the speciation and subsequent evolution of new species.In the figure shown, the original population has nearly equal numbers of blue and red individuals. The three smaller founder populations show that one or the other color may predominate (founder effect), due to random sampling of the original population. A population bottleneck may also cause a founder effect, though it is not strictly a new population. The founder effect occurs when a small group of migrants—not genetically representative of the population from which they came—establish in a new area. In addition to founder effects, the new population is often very small, so it shows increased sensitivity to genetic drift, an increase in inbreeding, and relatively low genetic variation.

WikidataRate this definition:0.0 / 0 votes

1. 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 individuals from a larger population. It was first fully outlined by Ernst Mayr in 1942, using existing theoretical work by those such as Sewall Wright. As a result of the loss of genetic variation, the new population may be distinctively different, both genetically and phenotypically, from the parent population from which it is derived. In extreme cases, the founder effect is thought to lead to the speciation and subsequent evolution of new species. In the figure shown, the original population has nearly equal numbers of blue and red individuals. The three smaller founder populations show that one or the other color may predominate, due to random sampling of the original population. A population bottleneck may also cause a founder effect even though it is not strictly a new population. The founder effect occurs when a small number of migrants that are not genetically representative of the population from which they came establish in a new area. In addition to founder effects, the new population is often a very small population and so shows increased sensitivity to genetic drift, an increase in inbreeding, and relatively low genetic variation. This can be observed in the limited gene pool of Iceland, Faroe Islands, Easter Islanders and those native to Pitcairn Island. Another example is the legendarily high deaf population of Martha's Vineyard, which resulted in the development of Martha's Vineyard Sign Language.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Founder Effect

   A phenomenon that is observed when a small subgroup of a larger POPULATION establishes itself as a separate and isolated entity. The subgroup's GENE POOL carries only a fraction of the genetic diversity of the parental population resulting in an increased frequency of certain diseases in the subgroup, especially those diseases known to be autosomal recessive.

How to pronounce founder effect?

1. Alex

   US English

   David

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   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

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   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

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   Fred

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   Tessa

   South African

How to say founder effect in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of founder effect in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of founder effect in Pythagorean Numerology is: 2

Examples of founder effect in a Sentence

1. Gregory Armstrong:

   The founder effect is a matter of a virus being in the right place at the right time.

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Founder_Effect
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Founder_Effect
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=founder effect