メンデル,メカニズム,モデル,マーケティング,その他
1Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA.
Cell
|September 26, 2015
まとめ
グレゴール・メンデルが 革新的な植物混合研究を発表してから 今年も150年になります 科学的プロセスと 新しい発見の捉え方について考えます
科学分野:
- 遺伝学 と 植物 学
- 科学の歴史
背景:
- 植物混合に関するグレゴール・メンデルの 基礎研究150周年を記念して
- メンデルの発見の歴史的文脈と科学的影響について
関連する概念動画
01:39Chromosomal Theory of Inheritance
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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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01:49Law of Segregation
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When crossing pea plants, Mendel noticed that one of the parental traits would sometimes disappear in the first generation of offspring, called the F1 generation, and could reappear in the next generation (F2). He concluded that one of the traits must be dominant over the other, thereby causing masking of one trait in the F1 generation. When he crossed the F1 plants, he found that 75% of the offspring in the F2 generation had the dominant phenotype, while 25% had the recessive phenotype.
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02:03Law of Independent Assortment
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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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02:03Law of Independent Assortment
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01:20Monohybrid Crosses
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Overview
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01:18Dihybrid Crosses
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Overview
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