CAS BI 107 Lecture Notes - Lecture 3: Cummington, Massachusetts, Transitional Fossil, Macroevolution
4 Nov 2016
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Office hours: 5 cummington street room 423 mwf 4-5pm. Interesting: the burdick print- known to be fake, but was shown on television as evidence that people coexisted with dinosaurs. Entertainment only: evolutionary change of horses, can be physically reconstructed by fossils found, the importance of transitional fossils: Like in amino acids, can be polar or nonpolar, affects what they do in the body (think chemistry). Ex a) hemoglobin human > monkey > animals further from human evolutionarily, less amino acids in common. The longer organisms have been separated according to the fossil record, the more differences are seen in the structure of their dna. On chromosome count: the common ancestry of humans. Orangutan, gorilla, and chimpanzee: all have 24 pairs of chromosomes. Humans: you can see in a human karyotype, at chromosome 2, where 2 pairs of great ape chromosomes fused! On human cognition- duplication of the srgap2 gene. When implanted in a mouse, stimulated brain growth.
