ANT101H5 Lecture Notes - Lecture 3: Mitosis, Thymine, Centromere
Document Summary
Dna structure & function: cellular functions are directed by dna, nucleotides two chains of smaller molecules composed in the dna molecule. 4 bases: (1) adenine (a) (2) guanine (g) (3) thymine (t) (4) cytosine (c: in the formation of the double helix, only one base can pair (a&t, g&c) 100 bases: regulatory genes genes that code for the production of proteins that can influence the action of other genes; important role in evolution (eg; many differences b/w chimpanzees. & humans: homeobox genes (hox genes) an evolutionarily ancient family of regulatory genes. Direct the segmentation and patterning of the overall body plan during embryonic development. The genetic principles discovered by mendel: hybrids offspring of mixed ancestry. Julian huxley: evolution: two stage process (1) the production and redistribution of variation (2) natural selection actin on the variation, whereby inherited differences of individuals affect their ability to successfully reproduce.
