Bio Lab-Population Genetics: the Hardy-Weinberg Principle Flashcards
(23 cards)
Natural selection
The differential survival and reproduction of individuals in a population
Origin Of Species
Provided an abundant and convincing evidence in support of evolution
Evolution
Change in populations over time
Theory
Explanatory power supporters by a large and divers body of evidence
Neo-Darwinism
Fusion of evolutionary biology with genetics of populations produced a new view of evolution
What does population genetics investigate?
Evolutionary change can arise due to natural selection, as well as migration, genetic drift, and mutation
“Changes in the genetic constitution of populations”
Evolution
Population
A group of organisms of the same species that occurs in the same area and have the opportunity to interbreed or share a common gene pool
Gene pool
All the alleles at all gene loci of all individuals in the population
Basic unit of evolutio
Population
Microevolution
Small-scale changes in the genetic structure of populations from generation to generation
Populations evolve not______
Individuals
Hardy-Weinburg Principle
Frequency of alleles in an ideal population will remain the same from generation to generation
Certain conditions for genetic variation:
- Population large 2. Matings random 3.No net changes in gene poo; due to mutation 4.No migration of individuals (gene flow) 5.No selection-genotypes equal
Testable
Hardy-Weinburg Principle
Sampling with replacement
Probability of selecting an allele should remain equal to its frequency
Gene flow
Migrations of individuals between two populations
Genetic drift
Effects of small populations size
Natural selection
The dominant will overcome the weaker
Genetic fixation
The loss of all but one possible allele at a gene loci in a population, common result of genetic drift in small natural populations
Bottleneck effect
When a population undergoes a drastic reduction in size as a result of chance events
Funder effect
Group of migrants becomes establishes in a new area not currently inhabited by species
Migraton of individuals between populations results in ____ ___
Gene flow