BIOL 1090 Lecture Notes - Lecture 1: Microtubule, Metaphase, Centromere
19 Apr 2016
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The evolutionary function- mutation (changes to dna sequences over time) Every time the dna wants to replicate itself it must copy that dna sequence. Half of each genome from your parents is replicated onto you. Genomes are not deterministic: interactions between genomes and environment that have the capability to change the way an organism will develop. Some mutations are mistakes that slip through, but some may be because of natural selection. Each subunit is a nucleotide comprised of: a phosphate group, five-carbon sugar (2. Deoxyribose: one of four cyclic nitrogenous bases. Phosphodiester bonds connect the purine and pyrimidine nucleotides in polynucleotide chains. Dna strands are polar: each strand of dna has chemical polarity: 5" end (five prime end) has a free phosphate group, 3" end (three prime end) has a free hydroxyl group. Dna is double-stranded and the strands are antiparallel.
