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

leading to a genetic bottleneck in humans. A number of genetic studies have found that 50,000 years ago, the human ancestor population greatly expanded from...

Look up bottleneck in Wiktionary, the free dictionary. Bottleneck literally refers to the narrowed portion (neck) of a bottle near its opening, which...

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...

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

effect of bottlenecks on the Dice Snake population when Dice Snakes were introduced into several lakes in Switzerland. A bottleneck on a population is "an...

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

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...

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...

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...

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...

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

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

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

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

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

common ancestral wolf population that existed as recently as 20,000 years ago. Grey wolves suffered a species-wide population bottleneck (reduction) approximately...

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

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

issues. Such issues from the bottleneck a sharp loss of genetic diversity and increased homozygosity in the surviving population, and also a decreased number...

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

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

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...

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