BISC 121Lg Lecture Notes - Lecture 2: Denisovan, Paleontology, Catastrophism
Document Summary
Watson and crick introduced the double helix: hereditary information is encoded in dna and reproduced in the body, dna directs biochemical, anatomical, physiological, and to an extent behavioral traits. There are 2 hydrogen bonds between adenine and thymine. There are 3 hydrogen bonds between cytosine and guanine. There are about 3 billion base pairs in the human genome. Archaic extinct human species split off early from the modern human lineage (neanderthals and denisovians) Modern human genome is between 1 and 6% archaic dna. Modern humans have acquired key alleles of an important immune system gene from interbreeding with neanderthals and denisovians. Linnaeus came up with a classification system to reveal the divine order of life: he did not believe in evolution, he was the father of taxonomy, he gave darwin the idea that life can be classified and organized. Evolution was gradualism vs. catastrophism: catastrophism- wrath of god, divine intervention, gradualism- things evolved slowly.
