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Population genetics and evolution (Evolution has important outcomes (Co…
Population genetics and evolution
Evolution defined as
Change in the inherited traits of population from generation to generation
Evolution play out through;Mechanisms
Genetic drift
Founder effect
Population bottleneck
Natural selection
Competition
Fitness
Gene flow
Hybridization
Migration
Evolution is perpetuated by; Heredity
Traits
Phenotype
Genes
Genotype
Evolution happens because of; Variation
Independent assortment
Mutations
Caused by
Viruses
Radiations
Mutagens
Transposons
Error in DNA replication
Recombination
Evolution has important outcomes
Co-operation
Reciprocity
Kin selection
Co-evolution
Mutualism
Commensalism
Parasitism
Extincton
Adaptation
Adaptive radiation
Speciation
Evolution as genetic change
Natural selection can affect phenotypes in a population
Directional selection
Stabilizing selection
Disruptive selection
Genetics
Mendelian
Alleles
Example; brown eyes and blue eyes etc.
Inheritance via
Alleles
Distributed by; Meiosis
Populations
Examples
Some mold on your bread
A flock of birds in an island
Population genetics can be modeled with
Hardy- Weinberg principle
Assumptions
No selection
If not, then..
Darwinian evolution
All these lead to
Change in allele frequency in subsequent generations
Which is the definition of evolution
No migrations
If not, then..
Gene flow
All these lead to
Change in allele frequency in subsequent generations
Which is the definition of evolution
No mutations
If not, then..
New alleles
All these lead to
Change in allele frequency in subsequent generations
Which is the definition of evolution
Random mating
If not, then..
Sexual selection
Examples; swallow talls
All these lead to
Change in allele frequency in subsequent generations
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Large population
If not, then..
Genetic drift
Examples; cheetahs
All these lead to
Change in allele frequency in subsequent generations
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