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Samir Okasha1

  • 1Department of Philosophy, University of Bristol, Bristol BS8 1TH, United Kingdom samir.okasha@bristol.ac.uk.

概括

门德尔的遗传学解决了达尔文的理论挑战. 同位素论澄清了进化生物学中的种群定义和"生存斗争",专注于同位素水平上的竞争.

相关概念视频

Chromosomal Theory of Inheritance01:39

Chromosomal Theory of Inheritance

In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.”
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Dihybrid Crosses01:18

Dihybrid Crosses

Overview
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Law of Independent Assortment02:03

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.
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Monohybrid Crosses01:20

Monohybrid Crosses

Overview
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