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Lecture 6

Lecture 6 - Modern Synthesis and Punctuated Equilibrium

2 Pages

Earth Sciences
Course Code
Earth Sciences 1083F/G
Cameron Tsujita

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Lecture 6Modern Synthesis and Punctuated Equilibrium y Francis Crick and James Waton discovered the helical structure of DNA 1953 o Provided molecular basis for inheritance and evolution y Structure of DNA o Key componentsPhosphatesSugarNucleotide bases adenine guanine thymine cytosine y Basic Tenets of Modern Synthesis o iological species concept a species is group of interbreeding organismso Genotype and Phenotype are separate genetic makeup and outward physical appearance are related but are separate entities o Mendels Laws of Inheritance no blending of characterso Random mutations and recombinations are the sources of variation the raw material for natural selection o Natural populations are gene pools that contain variation o Natural Selection and Random Genetic Drift both play role evolutionchan
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