'Evolutionary novelties' diaporamas de présentation

Tree of Life

Tree of Life. Planet Earth is about 4.6 billion years old. Oldest known rocks are about 3.8 billion years old. Oldest fossils (prokaryotes) are about 3.5 billion years old. Tree of Life. All living organisms on this planet share a common ancestor.

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ORIGIN OF EVOLUTIONARY NOVELTIES

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Cladograms and Phylogenetic Trees

Cladograms and Phylogenetic Trees. Ch 25 . Overview: Investigating the Tree of Life. Phylogeny is the evolutionary history of a species or group of related species Biologists draw on the fossil record, which provides information about ancient organisms.

1.68k views • 23 slides

Quantitative Genetics of Natural Variation: some questions

Quantitative Genetics of Natural Variation: some questions. Do most adaptations involve the fixation of major genes?. micromutationist view : adaptations arise by allelic substitution of slight effect at many (innumerable) loci, and no single substitution constitutes a major

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Quantitative Genetics of Natural Variation: some questions

Quantitative Genetics of Natural Variation: some questions. Do most adaptations involve the fixation of major genes?. micromutationist view : adaptations arise by allelic substitution of slight effect at many (innumerable) loci, and no single substitution constitutes a major

240 views • 14 slides