Evolution

Description

Mind Map on Evolution, created by mrrizkalla on 16/03/2014.
mrrizkalla
Mind Map by mrrizkalla, updated more than 1 year ago
mrrizkalla
Created by mrrizkalla about 10 years ago
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Resource summary

Evolution
  1. Mutation
    1. Def: Change
      1. Darwin
        1. de Vries
        2. Examples
          1. Morgan
            1. Sickle cell anemia
              1. Transposases and Corn
              2. Types
                1. Nucleotide substitutions (transition vs. transversion ?)
                  1. Indels
                    1. Duplication
                    2. Classification
                      1. Coding
                        1. Synonymous
                          1. Nonsynonymous
                            1. Nonsense
                              1. Read-through
                                1. Frame-shift
                                2. Non-coding
                                  1. NTR
                                    1. UTR
                                      1. Introns
                                      2. Regulatory
                                      3. Mutation Rates
                                        1. Loss of function (per gene/generation)
                                          1. Sequencing (per bp/generation)
                                        2. Drift
                                          1. Mutation-Drift Equilibrium
                                            1. Neutral theory
                                              1. Mutations we observe are mostly neutral
                                            2. Def. Loss or fixation
                                              1. theta = 4 N*mu
                                                1. Assumption: Complete neutrality
                                                  1. Explains
                                                    1. Polymorphism
                                                      1. Population size
                                                      2. Rate of evolution
                                                        1. Rate of neutral evolution (divergence) (k) = # mutations * prob. fix
                                                          1. Independent of N
                                                            1. = mu (pure neut.)
                                                              1. Fixed in species/generations
                                                              2. k = mu * f0 (Kimura)
                                                                1. f0 per protein
                                                                  1. f0 0 per DNA
                                                                    1. Molecular clock (constancy of change)
                                                                  2. Prob. fix(t=1) = (1/2N)^2N
                                                                2. Why 4N?
                                                              3. H-W
                                                                1. Assumptions
                                                                  1. No selection
                                                                    1. No mutation
                                                                      1. No migration
                                                                        1. No random drift
                                                                          1. Random mating
                                                                          2. Equilibrium
                                                                            1. f(AA) = p^2
                                                                              1. f(aa) = q^2
                                                                                1. f(Aa) = 2pq
                                                                              2. Selection
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