相关实验视频

Updated: Feb 10, 2026

Molecular Evolution of the Tre Recombinase
12:02

Molecular Evolution of the Tre Recombinase

Published on: May 29, 2008

10.1K

遗传漂移的进化超过5万代

Joao A Ascensao, QinQin Yu, Oskar Hallatschek

    bioRxiv : the preprint server for biology
    |February 9, 2026
    PubMed
    概括

    遗传漂移,生殖成功的随机变化,可以随着时间的推移而演变. 这项研究表明,大肠杆菌种群之间的后代数量差异不同,影响了突变的建立和适应.

    更多相关视频

    Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli15:00

    Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

    Published on: August 18, 2023

    4.4K
    Generation of Genetically Modified Mice through the Microinjection of Oocytes10:19

    Generation of Genetically Modified Mice through the Microinjection of Oocytes

    Published on: June 15, 2017

    21.7K

    相关概念视频

    Mutation, Gene Flow, and Genetic Drift01:09

    Mutation, Gene Flow, and Genetic Drift

    In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
    64.5K
    Genetic Drift03:33

    Genetic Drift

    Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
    44.2K
    The Evidence for Evolution02:55

    The Evidence for Evolution

    Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
    48.4K
    Convergent Evolution01:54

    Convergent Evolution

    Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
    33.1K
    Instinctive Drift01:05

    Instinctive Drift

    Instinctive drift refers to the tendency of animals to revert to their innate behaviors despite repeated reinforcement. Breland and Breland demonstrated this concept in an experiment with a raccoon. The raccoon was trained to pick up two coins and place them in a container in exchange for food. Initially, the raccoon learned to associate the coins with food, making them a conditioned stimulus or a substitute for food. However, over time, the raccoon became less willing to put the coins into the...
    772
    What is Population Genetics?01:25

    What is Population Genetics?

    A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
    64.9K