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The structure of DNA double helix and how it was discovered. Chargaff, Watson and Crick, and Wilkins and Franklin.
DNA replication and RNA transcription and translation. Leading and lagging strands in DNA replication. Speed and precision of DNA replication. Molecular structure of DNA. Molecular mechanism of DNA replication. Mode of DNA replication: Meselson-Stahl experiment. DNA proofreading and repair. Telomeres and telomerase.
Classical and molecular genetics | Biology archive | Science | Khan Academy. 34 units · 124 skills. Unit 1 Intro to biology. Unit 2 Water, acids, and bases. Unit 3 Macromolecules. Unit 4 Elements of life. Unit 5 Energy and enzymes. Unit 6 Structure of a cell. Unit 7 More about cells.
La estructura de doble hélice del ADN y cómo se descubrió. Chargaff, Watson y Crick, Wilkins y Franklin.
Learn about the structure and function of DNA, including its role in inheritance and genetic information storage.
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Now, we see gamete types that are present in very unequal proportions. The common types of gametes contain parental configurations of alleles—that is, the ones that were already together on the chromosome in the organism before meiosis (i.e, on the chromosome it got from its parents). The rare types of gametes contain recombinant configurations of alleles, that is, ones that can only form if a recombination event (crossover) occurs in between the genes.
Course: Biology archive > Unit 23. Lesson 1: Evolution and natural selection. Introduction to evolution and natural selection. Ape clarification. Natural selection and the owl butterfly. Darwin, evolution, & natural selection. Variation in a species. Natural selection and Darwin. Evidence for evolution.
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