Evolution

Descripción

Mapa Mental sobre Evolution, creado por mrrizkalla el 16/03/2014.
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Mapa Mental por mrrizkalla, actualizado hace más de 1 año
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Creado por mrrizkalla hace alrededor de 10 años
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Resumen del Recurso

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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