BIO-2012 Lecture Notes - Lecture 4: Great Chain Of Being, Thomas Robert Malthus, Gene Duplication

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21 Feb 2018
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Consistency with a vast amount of known data, observations, experimentation, laws, principles, and facts. Biological species concept- organisms that can reproduce to make viable offspring are considered the same species. Evolution - change in the properties of groups of organisms over the course of generations. Before darwin, darwin, after darwin, modern synthesis, post synthesis. Thomas malthus (an economist)- only a fraction of any population will survive and. Spontaneous generation of new life progressing up the chain. Eidos or essence of each creature vs actuality. Current physical processes explain what happened in the past. Expect a larger genome (# of base pairs) in complex organisms. True for eukaryotes -> prokaryote -> virus. Lots of dna with no known purpose and duplicate genes. Now we can count actual genes instead. # of genes increases in eukaryotes from unicellular to multicellular tissue forming taxa. Ancestral dna is copied and pasted back into the genome. Paralogous- the two copies in one lineage.