• Thumbnail for Population bottleneck
    A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes...
    25 KB (2,891 words) - 13:14, 25 March 2024
  • Thumbnail for Toba catastrophe theory
    leading to a genetic bottleneck in humans. A number of genetic studies have revealed that 50,000 years ago, the human ancestor population greatly expanded...
    48 KB (4,921 words) - 18:58, 16 February 2024
  • Thumbnail for Bottleneck
    Look up bottleneck in Wiktionary, the free dictionary. Bottleneck literally refers to the narrowed portion (neck) of a bottle near its opening, which...
    2 KB (266 words) - 11:13, 29 March 2023
  • Thumbnail for World population
    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...
    133 KB (9,685 words) - 00:29, 21 March 2024
  • Thumbnail for Founder effect
    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...
    36 KB (4,215 words) - 14:17, 6 March 2024
  • Thumbnail for American bison
    slaughtering of bison during the 1870s, the plains bison population went through a population bottleneck from an estimated 60 million individuals–an estimation...
    98 KB (11,385 words) - 04:56, 14 March 2024
  • Thumbnail for Dice snake
    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...
    13 KB (1,422 words) - 16:06, 20 March 2024
  • Thumbnail for Estimates of historical world population
    human population bottleneck is postulated by some scholars at approximately 70,000 years ago, during the Toba catastrophe, when Homo sapiens population may...
    48 KB (3,576 words) - 16:50, 16 March 2024
  • Genetic drift (category Population genetics)
    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...
    52 KB (6,266 words) - 20:17, 16 March 2024
  • Thumbnail for Introduction to evolution
    population bottleneck, the reduction does not favour any combination of alleles; it is totally random chance which individuals survive. A bottleneck can...
    80 KB (9,137 words) - 00:59, 21 March 2024