Lecture 1- evolution - Lecture 1: Evolution 2/8/08 When DNA...

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Lecture 1: Evolution 2/8/08 When DNA is replicated, it does so semi-conservatively . Most of the time it works well, but there is no organism that can PERFECTLY replicate its DNA Occasionally, when DNA is replicated. .mutations occur (changes introduced) This info codes for traits, when we pass on this info it’s changed. In humans… every time DNA replicates, there are about 6 mutations introduced (exp: signs of aging) Age= highest risk factor for getting cancer (related to this) DNA MUST be replicated before it can be passed on…how it is passed on and modified impacts evolution. Lots of genetic diversity involved in sexual reproduction When DNA gets passed on, combine different alleles…also, information is changed through mutations Mutations: sickle-cell anemia- one change in one nucleotide, changes an amino acid in hemoglobin, brings on this disease (this change in DNA leads to different allele) How do individuals and groups with different genes arise? Evolution…does it occur and how does it arise? Diversity of different species on
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This note was uploaded on 08/09/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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Lecture 1- evolution - Lecture 1: Evolution 2/8/08 When DNA...

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