A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes...

remaining effective population sizes are around 10,000 individuals, larger than the estimated non-African size during their bottleneck. Unlike the non-African...

Look up bottleneck in Wiktionary, the free dictionary. A bottleneck is the narrowed portion (neck) of a bottle near its opening, which limits the rate...

earlier, genetic evidence suggests humans may have gone through a population bottleneck of between 1,000 and 10,000 people about 70,000 BC, according to...

slaughtering of bison during the 1870s, the plains bison population went through a population bottleneck from an estimated 60 million individuals–an estimation...

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...

contracted to just four random survivors, a phenomenon known as a population bottleneck. The probabilities for the number of copies of allele A (or B) that...

amongst the population post-fur trade but pre-discovery that was so low, this produced an evolutionary bottleneck. An evolutionary bottleneck is a phenomenon...

human population bottleneck is postulated by some scholars at approximately 70,000 years ago, during the Toba catastrophe, when Homo sapiens population may...

population bottleneck, the reduction does not favour any combination of alleles; it is totally random chance which individuals survive. A bottleneck can...

population. Population size is directly associated with amount of genetic drift, and is the underlying cause of effects like population bottlenecks and...

Maritime Southeast Asia by about 65,000 years ago. The establishment of population centers in Western Asia, the Indian subcontinent and in East Asia is attested...

attributed to a population bottleneck among ancestors of modern Finns, estimated to have occurred about 4000 years ago, presumably when populations practicing...

simple population models in order to infer historical demographic changes, such as the presence of population bottlenecks, admixture events or population divergence...

consequences for human populations as it killed most humans living at that time and is believed to have created a population bottleneck in central east Africa...

Small populations can behave differently from larger populations. They are often the result of population bottlenecks from larger populations, leading...

clade compared against Lowlanders. The Highlanders underwent a population bottleneck around 10,000 years ago, associated with the adoption of Neolithic...

habitat. Eventually, loss of habitat could lead to a population bottleneck. In a small population, the risk of inbreeding will increase drastically which...

from earlier Siberian wolf populations. While some sources have suggested that this the result of a population bottleneck, others suggest that this is...

through a population bottleneck of fewer than 100 individuals during its near-extinction event, leading to very low genetic diversity across populations. The...

species (phylogenetics), as well as the population structure, demographic history (e.g. population bottlenecks, population growth), biological dispersal, source–sink...

Phascolarctos cinereus in south-eastern Australia following a severe population bottleneck". Molecular Ecology. 5 (2): 269–81. Bibcode:1996MolEc...5..269H...

Thousands of years ago, the cheetah went through a population bottleneck that reduced its population dramatically so the animals that are alive today are...

average in ethnically Jewish populations, particularly Ashkenazi Jews, because of relatively recent population bottlenecks and because of consanguineous...

often the result of a population bottleneck. In general, the higher the genetic variation or gene pool within a breeding population, the less likely it...

groupings in the human population it is possible to assert that more than a dozen major variants survived the population bottleneck. This observation is...

of some isolated prairie-chicken populations in the Eastern portion of the range resulted in a population bottleneck, which reduced the genetic diversity...

other species suggests a population bottleneck during the Late Pleistocene (around 100,000 years ago), in which the human population was reduced to a small...

that early humans left Africa, and thus must have passed through a population bottleneck before their African-Eurasian divergence around 100,000 years ago...

diversity of the domesticated population, especially of alleles of genes targeted by selection. One reason is a population bottleneck created by artificially...