变种,自然选择和网络:三位历史学家与理论人口遗传学家对比
1Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, K7L3N6, Canada. forsdyke@queensu.ca.
Theory in biosciences = Theorie in den Biowissenschaften
|January 28, 2024
概括
遗传学家质疑现代合成,提出分子水平的DNA变异可能解释自然选择之外的进化. 这挑战了长期以来的理论,并为进化生物学研究提供了新的途径.
科学领域:
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
- 科学的历史科学的历史.
背景情况:
- 1960年代的"现代合成"强调了物种的自然选择,整合了门德尔和达尔文的遗传学.
- 历史学家马克·亚当斯 (Mark Adams) 和威廉·普罗维恩 (William Provine) 最初支持这一观点,并广泛传授这一观点.
- 从分子生物学中出现了怀疑,促使亚当斯和普罗维恩重新评估传统的进化论叙述.
研究的目的:
- 探索进化生物学中已建立的遗传正统论的挑战.
- 研究分子层次现象在进化过程中的潜在作用.
- 将科学争议置于更广泛的社会政治框架内.
主要方法:
- 科学思想及其演变的历史分析.
- 检查遗传学,分子生物学和科学史的理论贡献.
- 在不同政治制度中对科学叙事控制的比较分析.
主要成果:
- 分子生物学家和历史学家在传统合成中发现了异常.
- 唐纳德·福斯迪克 (Donald Forsdyke) 提出,寡核酸差异可以解释"集体变异"和"残留"概念.
- 这场争议凸显了已建立的遗传网络与较小的批评历史学家之间的紧张关系.
结论:
- 这项研究表明,分子水平的DNA变异,例如寡核酸差异,可能为进化机制提供了替代解释.
- 它挑战了自然选择的排他性作用,并呼吁重新评估进化基础.
- 科学共识和范式转变可以受到科学证据和它们出现的政治背景的影响.
相关概念视频
Genetics of Speciation
19.3K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.3K
Mutation, Gene Flow, and Genetic Drift
58.4K
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).
58.4K
What is Population Genetics?
58.0K
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.
58.0K
Gene Flow
35.1K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
35.1K
Speciation Rates
21.2K
Overview
21.2K
Formation of Species
39.3K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
39.3K


