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Population Genetics & Evolution (Evolution & Origin of Life…
Population Genetics & Evolution
Population Genetics
Factors Causing Gene Pool Change
Mutation
All genomes are subjected
Accidents
Organism Cannot Adapt
Many different phenomena.
Artificial Selection
Purposefully changing allele frequency.
Gene Pool Alteration
Produce ornamental plants
Conjunction w/ artificial mutation
Natural Selection
Significant Factor
Gene Pool Changes
Survival of the Fittest
Non Natural Selection Factors
Purpose
Intention
Planning
Voluntary Decision Making
Natural Selection Does Not Operate
Multiple Selection Pressures
Speciation
Phyletic Speciation
Pollen Transfer
Seed Dispersal
Vegetative Propagation
Divergent Speciation
Biological Reproductive Barriers
Biological Reproductive Barriers
Adaptive Radiation
Convergent Evolution
Evolution & Origin of Life
Conditions on Earth Before Life
Chemicals Present
Second Atmosphere
Reducing Atmosphere
Energy Sources
Time Available for Life Origin
No Limits
Formation of Polymers
Numerous Mechanisms
Highly Concentrated Reactants
Absorption by clay particles.
Aggregation & Organization
Chemical components into masses.
Fatty, hydrophobic material
Early Metabolism
Heterotrophic aggregates
Oxygen
Evolution of Chlorophyll a
Evolution of photosynthesis
Consequences
Allows world to rust.
Created conditions
Aerobic Respiration
Presence of Life
Slow, gradual transitions
Inorganic Compounds to Living Bacteria
Chemicals Produced Chemosynthetically
Rates of Evolution
Rapid population change.
Few mutations produce new phenotype.
Species well adapted.
