BIO 111 Lecture Notes - Lecture 5: Pilus, Deamination, Base Pair
12 Feb 2018
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Bio 111 - lecture #5 - mutations, genes, and genetic code. Do not mate (fuse) with each another individual. They can however exchange dna through a pilus. The result is that the dna is degraded. A new allele is made in the divided daughter cells: dna from donor cell chromosome to chromosome of recipient cell, sites of crossing over, degraded, division into two daughter cells, sex pilus combinations of alleles. Faithfull form hydrogen bonds to pass on information from one generation to another. Mutations from dna synthesis: rare alternative forms of bases. Spontaneous mutations after synthesis: deaminated forms of base pairs. Chemical mutagens: dna bentozypymine (attaches to a g and prevents it from base pairing. ) Mutations induced by radiation: x-rays, radioactive decay causes either single- stranded breaks or double-stranded breaks. Repaired mutations: dna polymerase can repair base pair issues. A. proofreading during dna synthesis- dna polymerase (standard polymerase). Wrong bases are put in and taken out through this process.
