澄清孟德尔式与非孟德尔式遗传.
Susan Strome1, Needhi Bhalla1, Rohinton Kamakaka1
1Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, CA 95064, USA.
Genetics
|May 28, 2024
概括
许多常被引用的非孟德尔遗传的例子,如不完整的统治和与性别相关的特征,实际上遵循格雷戈尔·孟德尔的定律. 这些分离和独立分类的原则解释了变异过程中的基因行为,支了门德尔遗传.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 格雷戈尔·门德尔在1800年代中期通过花生植物研究建立了遗传的基本原则.
- 孟德尔的分离和独立分类定律描述了基因和等位基因在变异过程中的行为.
- 这些定律构成了孟德尔遗传的基础,用于跨物种的众多特征和疾病.
研究的目的:
- 为了澄清为什么常被引用的非孟德尔遗传的例子,如不完整的统治和与性别相关的特征,实际上遵守孟德尔原则.
- 要强调这些例子遵守孟德尔的定律,尽管没有产生经典的孟德尔的表型比.
- 倡导在教育资源中准确地代表遗传原则,并鼓励合作进行纠正.
主要方法:
- 对遗传遗传模式的概念分析.
- 审查孟德尔遗传学和半变化的既定原则.
- 检查常见的遗传模式的例子,这些遗传模式通常被错误地归类为非门德尔式.
主要成果:
- 诸如不完全主导,共主导,多个等位基因,性别相关的特征和多基因特征等例子表明孟德尔遗传.
- 这些模式遵循孟德尔的分离和独立分类定律.
- 与经典的孟德尔比率的偏差不会使底层的孟德尔原则无效.
结论:
- 通常引用的"非门德尔式"遗传例子实际上是门德尔式的.
- 对孟德尔遗传的准确理解对学生和医疗保健专业人员至关重要.
- 在学习资源中不断监测和纠正遗传信息是必不可少的.
相关概念视频
01:39Chromosomal Theory of Inheritance
55.3K
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.”
55.3K
01:20Monohybrid Crosses
230.0K
Overview
230.0K
01:49Law of Segregation
65.8K
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.
65.8K
02:03Law of Independent Assortment
55.6K
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.
55.6K
01:25Inheritance
380
Gregor Mendel's pioneering work on the principles of inheritance fundamentally transformed our understanding of how traits are transmitted from generation to generation. His experiments with pea plants laid the groundwork for the discovery of genes, discrete units within organisms that control heredity.
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype...
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype...
380
01:35Pedigree Analysis
84.2K
Overview
84.2K