Population Genetics Flashcards
All of the alleles of all individuals in a population
Gene pool
All of the alleles of all individuals in a population
Gene pool
A group of the specie living in an area
Population
Formation of nee species
Speciation
Study of genetic variation within a population
Population Genetics
Modern Synthesis Theory is intoduced by
Fisher and Wright
Describes the evolution in terms of genetic variations in a population that leads to the formation of a new specie
Modern Synthesis Theory
Gene pool changes cause more variation in individuals in the population this process called
Microevolution
States that by itself, the process of hereditary in a random mating population does not change either allelic frequencies or genotypic frequencies at a given locus
Hardy-Weinberg Principle
Shuffling of alleles by meiosis and random fertilization have __ on the overall gene pool
No effect
Results in evolution
Deviation
5 assumptions of the H-W Principle
Large population size
No migration
No net mutations
Random mating
No natural selection
The gene pool of a non evolving population remains __ over multiple generations
Constant
The change in the gene pool of a small population due to chance
Genetic drift
Success in reproduction based on heritable traits results in selected alleles by being passed to relatively more offspring
Natural Selection
Genetic drift due to the migration of fertile individuals or gametes between population
Gene flow
A change in an organism’s DNA
Mutation
A drastic reduction in population
Bottleneck effect
Occurs when a new colony is started by a few members of the original population
Founder effect
Favors individuals at one end of the phenotypic range
Directional Selection
Favors extreme over intermediate phenotypes
Disruptive Selection
Favors intermediate over extreme phenotypes
Stabilizing Selection
Variation in a species due to climate
Geographic variation
Source of most genetic differences between individuals in a population
Genetic Recombination
Often occurs between parasite and host
Co-evolution