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Study sets matching "population evolution chapter 23"

26 terms
Chapter 23 Evolution of Populations
microevolution
macroevolution
population
population genetics
Change in genetic makeup of a population from generation to g…
Evolutionary change above the species level
Group of individuals of the same species living in the same a…
Study of allele frequency distribution and change under the i…
microevolution
Change in genetic makeup of a population from generation to g…
macroevolution
Evolutionary change above the species level
20 terms
Chapter 23: Population Evolution
genetic variation
microevolution
geographic variation
population
the number and frequency of alleles that are present in a par…
evolution resulting from small specific genetic changes that…
Differences between the gene pools of geographically separate…
a group of organisms of the same species populating a given a…
genetic variation
the number and frequency of alleles that are present in a par…
microevolution
evolution resulting from small specific genetic changes that…
20 terms
Chapter 23: Population Evolution
Population
Micro evolution
4 sources of genetic variation @ popul…
Cline
Members of the same species in a geographic location that int…
Evolution @ population level
1. Mutations- errors in replication or due to mutagen ... 2. Cro…
Gradual change in character of a population along a geographi…
Population
Members of the same species in a geographic location that int…
Micro evolution
Evolution @ population level
29 terms
Chapter 23: The Evolution of Populations
What evolves?
Population genetics
Gene pool
Hardy-Weinberg equation
populations
Studying changes in a population (gene pool)
All of the alleles in all the individuals that make up a popu…
p^2 + 2pq + q^2 = 1
What evolves?
populations
Population genetics
Studying changes in a population (gene pool)
27 terms
Chapter 23: The Evolution of Population
_______ don't evolve, but __________ d…
Population
Species
Gene Pool
INDIVIDUALS don't evolve, but POPULATIONS do evolve.
A group of individuals of the same species that live in the s…
Group or population whose individual are able to reproduce wi…
Consists of all copies of every type of allele at every locus…
_______ don't evolve, but __________ d…
INDIVIDUALS don't evolve, but POPULATIONS do evolve.
Population
A group of individuals of the same species that live in the s…
24 terms
Chapter 23: The Evolution of Population
Microevolution
Genetic Variation
Average Heterozygosity
Geographic Variation
Change in allele frequencies in a population over generations
Differences among individuals in the composition of their gen…
Average percentage of loci that are heterozygous
Differences in the genetic composition of separate populations
Microevolution
Change in allele frequencies in a population over generations
Genetic Variation
Differences among individuals in the composition of their gen…
27 terms
Chapter 23: The Evolution of Population
_______ don't evolve, but __________ d…
Population
Species
Gene Pool
INDIVIDUALS don't evolve, but POPULATIONS do evolve.
A group of individuals of the same species that live in the s…
Group or population whose individual are able to reproduce wi…
Consists of all copies of every type of allele at every locus…
_______ don't evolve, but __________ d…
INDIVIDUALS don't evolve, but POPULATIONS do evolve.
Population
A group of individuals of the same species that live in the s…
41 terms
Microevolution: The Evolution of Populations (chapter 23)
Microevolution
Population Genetics
Species
Gregor Mendel
• At the population level, a generation-to-generation change…
studying how population change genetically over time... Studied…
group of populations whose individuals have the potential to…
proposed a particulated model of inheritance, which stated th…
Microevolution
• At the population level, a generation-to-generation change…
Population Genetics
studying how population change genetically over time... Studied…
26 terms
Chapter 23 Evolution of Populations
microevolution
macroevolution
population
population genetics
Change in genetic makeup of a population from generation to g…
Evolutionary change above the species level
Group of individuals of the same species living in the same a…
Study of allele frequency distribution and change under the i…
microevolution
Change in genetic makeup of a population from generation to g…
macroevolution
Evolutionary change above the species level
14 terms
Chapter 23: The Evolution of Populations
Population genetics
Population
Gene Pool
Hardy-Weinberg Theorem
The study of how populations change genetically over time
A group of individuals of the same species that live in the s…
All of the alleles at all loci in all the members of a popula…
Used to describe a population that is not evolving
Population genetics
The study of how populations change genetically over time
Population
A group of individuals of the same species that live in the s…
38 terms
Chapter 23 - Evolution of Populations
natural selection
microevolution
3 that can causes allele freq change
only natural selection improves
- evolutionary impact of natural selection is only apparent i…
- change in allele freq in pop over generations... - nat selec n…
1) natural selection... 2) genetic drift - alter freq... 3) gene fl…
- the match between organism and environment aka adaptaion
natural selection
- evolutionary impact of natural selection is only apparent i…
microevolution
- change in allele freq in pop over generations... - nat selec n…
31 terms
Chapter 23: The Evolution of Populations
Microevolution
gene pool
allele
genotype
evolution on the smallest scale—a generation-to-generation ch…
Combined genetic information of all the members of a particul…
An alternative form of a gene.
An organism's genetic makeup, or allele combinations.
Microevolution
evolution on the smallest scale—a generation-to-generation ch…
gene pool
Combined genetic information of all the members of a particul…
Chapter 23: The Evolution of Populations
adaptation
population
gene pool
gene flow
Inherited characteristic of an organism that enhances its sur…
group of individuals of same species that live in the same ar…
aggregate of all copies of every type of allele at all loci i…
transfer of alleles from one population to another, resulting…
adaptation
Inherited characteristic of an organism that enhances its sur…
population
group of individuals of same species that live in the same ar…
29 terms
Chapter 23: The Evolution of Populations
What evolves?
Population genetics
Gene pool
Hardy-Weinberg equation
populations
Studying changes in a population (gene pool)
All of the alleles in all the individuals that make up a popu…
p^2 + 2pq + q^2 = 1
What evolves?
populations
Population genetics
Studying changes in a population (gene pool)
18 terms
Chapter 23 (Evolution of Populations)
Evolution
Population
Species
Individuals
Change in genetic make up of a population overtime
Group of individuals of the same species living in the same p…
Group of individuals that can interbreed naturally
What does natural selection act on?
Evolution
Change in genetic make up of a population overtime
Population
Group of individuals of the same species living in the same p…
18 terms
Chapter 23: The Evolution of Populations
adaptive evolution
bottleneck effect
directional selection
disruptive selection
Evolution that results in a better match between organisms an…
Genetic drift that occurs when the size of a population is re…
Natural selection in which individuals at one end of the phen…
Natural selection in which individuals on both extremes of a…
adaptive evolution
Evolution that results in a better match between organisms an…
bottleneck effect
Genetic drift that occurs when the size of a population is re…
37 terms
Chapter 23 - The Evolution of Populations
Evolution is most basically:
Microevolution
5 Agents of Microevolution
What is required for evolution to have…
A change in allele frequencies
Evolution on the smallest scale
- Mutations... - Gene Flow... - Genetic Drift... - Non-random mating... -…
A change in allele freuqencies
Evolution is most basically:
A change in allele frequencies
Microevolution
Evolution on the smallest scale
17 terms
Chapter 23: The Evolution of Populations
population
species
gene pool
fixed allele
localized group of individuals of the same species
organisms that can mate and reproduce
all of the genes (both alleles) in a population at any time
allele that is the same for all members of the population (ra…
population
localized group of individuals of the same species
species
organisms that can mate and reproduce
31 terms
CHAPTER 23 evolution of populations
-allelic variation... -alleles passed dow…
evolution
microevolution
Hardy-Weinberg Equilibrium principle
darwins 4 postulates, restated
change in allele frequency in population over generations
study of evolution at population level
null model of how populations act when evolution is not occur…
-allelic variation... -alleles passed dow…
darwins 4 postulates, restated
evolution
change in allele frequency in population over generations
25 terms
Chapter 23: Evolution of Populations
Microevolution
genetic drift
gene flow
genetic variation
Change in allele frequencies in a population over generations.
A change in the allele frequency of a population as a result…
exchange of alleles between populations
Differences among individuals in the composition of their gen…
Microevolution
Change in allele frequencies in a population over generations.
genetic drift
A change in the allele frequency of a population as a result…
Chapter 23: Evolution of Populations
microevolution
population genetics
Modern Synthesis
Population
Change in allele frequencies in a population over generations.
The study of genetic changes in populations; the science of m…
A comprehensive theory of evolution that incorporates genetic…
A group of individuals that belong to the same species and li…
microevolution
Change in allele frequencies in a population over generations.
population genetics
The study of genetic changes in populations; the science of m…
30 terms
Chapter 23: Evolution of Populations
Microevolution
Three main mechanisms can cause allele…
Genetic Variation
Example of Genetic Variation
The change in allele frequencies in a population over generat…
Natural selection... Genetic drift... Gene flow
Represents differences among individuals in the composition o…
Microevolution
The change in allele frequencies in a population over generat…
Three main mechanisms can cause allele…
Natural selection... Genetic drift... Gene flow
26 terms
Chapter 23 Evolution of Populations
microevolution
macroevolution
population
population genetics
Change in genetic makeup of a population from generation to g…
Evolutionary change above the species level
Group of individuals of the same species living in the same a…
Study of allele frequency distribution and change under the i…
microevolution
Change in genetic makeup of a population from generation to g…
macroevolution
Evolutionary change above the species level
31 terms
Chapter 23: Evolution of Populations
microevolution
genetic variation
neutral variation
population
change in allele frequencies in a population over generations…
differences among individuals in the composition of their gen…
differences in DNA sequence that do not confer a selective ad…
group of individuals of the same species that live in the sam…
microevolution
change in allele frequencies in a population over generations…
genetic variation
differences among individuals in the composition of their gen…
36 terms
The Evolution of Populations (Chapter 23)
genetic variation
phenotype
microevolution
geographic variation
differences among individuals in the composition of their gen…
product of inherited genotype and environmental influence... ONL…
change in allele frequencies in a pop over a generation
differences in the genetic composition of separated pops
genetic variation
differences among individuals in the composition of their gen…
phenotype
product of inherited genotype and environmental influence... ONL…
26 terms
Chapter 23- The Evolution of Populations
Microevolution
Genetic variation
Importance of genetic variation
Average heterozygosity
As change in allele frequencies in a population over generati…
Differences among individuals in the composition of their gen…
It is necessary for allelic frequencies to change for evoluti…
The average percentage of loci that are heterozygous
Microevolution
As change in allele frequencies in a population over generati…
Genetic variation
Differences among individuals in the composition of their gen…
29 terms
Chapter 23: The Evolution of Populations
What evolves?
Population genetics
Gene pool
Hardy-Weinberg equation
populations
Studying changes in a population (gene pool)
All of the alleles in all the individuals that make up a popu…
p^2 + 2pq + q^2 = 1
What evolves?
populations
Population genetics
Studying changes in a population (gene pool)
29 terms
Chapter 23: The Evolution of Populations
What evolves?
Population genetics
Gene pool
Hardy-Weinberg equation
populations
Studying changes in a population (gene pool)
All of the alleles in all the individuals that make up a popu…
p^2 + 2pq + q^2 = 1
What evolves?
populations
Population genetics
Studying changes in a population (gene pool)
15 terms
Chapter 23- Population Evolution
Microevolution
Natural Selection
Directional Selection
Disruptive Selection
A change in allele frequency in a population over time
Can drive change in allele frequencies over time
Over time the proportion of individuals with a particular phe…
Patchy Environment... Over time the proportion of individuals ar…
Microevolution
A change in allele frequency in a population over time
Natural Selection
Can drive change in allele frequencies over time
31 terms
Chapter 23: The Evolution of Populations
Microevolution
Natural Selection, Genetic Drift, Gene…
Alleles
Heterozygous
A change in allele frequencies in a population over generatio…
Three mechanisms that cause allele frequencies to change.
Alternative versions of a gene that may produce distinguishab…
Two different alleles for a given locus (trait).
Microevolution
A change in allele frequencies in a population over generatio…
Natural Selection, Genetic Drift, Gene…
Three mechanisms that cause allele frequencies to change.
50 terms
Chapter 23- Evolution of Populations
What is the smallest unit of evolution…
Populations
Microevolution
Variation within Populations
populations!
a localized group of individual that are capable of interbree…
a change in allele frequencies in a population over generatio…
caused by difference sin genes or other DNA segments; natural…
What is the smallest unit of evolution…
populations!
Populations
a localized group of individual that are capable of interbree…
26 terms
Chapter 23 Evolution of Populations
microevolution
macroevolution
population
population genetics
Change in genetic makeup of a population from generation to g…
Evolutionary change above the species level
Group of individuals of the same species living in the same a…
Study of allele frequency distribution and change under the i…
microevolution
Change in genetic makeup of a population from generation to g…
macroevolution
Evolutionary change above the species level
29 terms
Chapter 23: The Evolution of Populations
What evolves?
Population genetics
Gene pool
Hardy-Weinberg equation
populations
Studying changes in a population (gene pool)
All of the alleles in all the individuals that make up a popu…
p^2 + 2pq + q^2 = 1
What evolves?
populations
Population genetics
Studying changes in a population (gene pool)
23 terms
The Evolution of Populations: Chapter 23
microevolution
macroevolution
What 4 mechanisms case allele frequenc…
genetic variation
-evolution that happens to a single population... -this is when…
-a change that happens to a whole species such as wolves turn…
-gene mutation... -natural selection... -genetic drift (chance even…
-a difference in genes or other DNA segments that can occur a…
microevolution
-evolution that happens to a single population... -this is when…
macroevolution
-a change that happens to a whole species such as wolves turn…
17 terms
Chapter 23 (The evolution of population)
Two processes that produce the variati…
Population
gene pool
A locus is fixed if:
Mutation and sexual reproduction
a localized group of individuals capable of interbreeding and…
consists of all the alleles for all loci in a population
all individuals in a population are homozygous for the same a…
Two processes that produce the variati…
Mutation and sexual reproduction
Population
a localized group of individuals capable of interbreeding and…
32 terms
Chapter 23 (The Evolution of Populations)
Microevolution
Alleles
Population
Population Genetics
A change in the allele frequencies of a population
Genes for a particular trait
Group of individuals of same species occupying a given area
Emphasizes the extensive variation in a population
Microevolution
A change in the allele frequencies of a population
Alleles
Genes for a particular trait
29 terms
Chapter 23: The Evolution of Populations
What is the smallest unit of evolution?
What is microevolution?
What are the three main mechanisms tha…
What is the only mechanism that is ada…
populations
changes in the allele frequencies of a population over genera…
1) natural selections... 2) genetic drift... 3) gene flow
natural selection
What is the smallest unit of evolution?
populations
What is microevolution?
changes in the allele frequencies of a population over genera…
84 terms
Chapter 23 Evolution of Populations
Microevolution
Genetic Variation
Neutral Variation
Mutation
Evolutionary change below the species level; a change in alle…
Differences among individuals in the composition of their gen…
Genetic variation that does not provide a selective advantage…
A change in the nucleotide sequence of an organism's DNA.
Microevolution
Evolutionary change below the species level; a change in alle…
Genetic Variation
Differences among individuals in the composition of their gen…
Chapter 23: Evolution of Population
Hardy-Weinberg Requirements:
Hardy-Weinberg equation:
Artificial selection:
Adaptive radiation:
1. Population can't be evolving... 2. Large population size... 3. R…
p2 + 2pq + q2
Mating with individuals that possess desired traits
Some species give rise to alarge number of daughter species t…
Hardy-Weinberg Requirements:
1. Population can't be evolving... 2. Large population size... 3. R…
Hardy-Weinberg equation:
p2 + 2pq + q2
96 terms
Chapter 23- Evolution of Populations
How do we know when evolution is occur…
What evolves?
What can individuals do?
Types of evolution involved in change…
We have to know genetic and phenotypic similarities
Populations
Live or die; reproduce or not
Microevolution and adaptive evolution
How do we know when evolution is occur…
We have to know genetic and phenotypic similarities
What evolves?
Populations
37 terms
Chapter 23: The Evolution of Populations
Do organism evolve during their lifeti…
Microevolution
Mechanism that cause allele frequency…
Genetic Variation
organisms do not evolve during their lifetime, only populatio…
changes in allele frequencies... -changes in p & q
1. natural selection ... 2. genetic drift ... 3. gene flow
is caused by differences in genes or other DNA segments
Do organism evolve during their lifeti…
organisms do not evolve during their lifetime, only populatio…
Microevolution
changes in allele frequencies... -changes in p & q
32 terms
Chapter 23- The Evolution of Population
allele
average heterozygosity
balancing selection
bottleneck effect
Any of the alternative versions of a gene that produce distin…
The percent, on average, of a population's loci that are hete…
Natural selection that maintains two or more phenotypic forms…
Genetic drift that occurs when the size of a population is re…
allele
Any of the alternative versions of a gene that produce distin…
average heterozygosity
The percent, on average, of a population's loci that are hete…
53 terms
Chapter 23: evolution of population
variation
new alleles
gene number
sexual reproduction
sources of genetic ______ : ... formation of new alleles... alterin…
formation of ____ ____ : arise by mutation - mutations in ger…
altering ____ _____ :... - errors in meiosis can duplicate genes…
- crossing over and independent assortment during meiosis cre…
variation
sources of genetic ______ : ... formation of new alleles... alterin…
new alleles
formation of ____ ____ : arise by mutation - mutations in ger…
42 terms
Chapter 23 The Evolution of Populations
What is microevolution?
What are the 3 main mechanisms that ca…
Why is variation important?
Genetic Variation
Microevolution is evolutionary change below the species level…
Natural selection, Genetic drift, & Gene flow
Individuals differed in their inherited traits & that selecti…
differences among individuals in the composition of their gen…
What is microevolution?
Microevolution is evolutionary change below the species level…
What are the 3 main mechanisms that ca…
Natural selection, Genetic drift, & Gene flow
12 terms
Chapter 23: Evolution of a Population
microevolution
genetic variation
neutral variation
population
evolutionary change below the species level; change in the al…
differences among individuals in the composition of their gen…
genetic variation that does not provide a selective advantage…
a group of individuals of the same species that live in the s…
microevolution
evolutionary change below the species level; change in the al…
genetic variation
differences among individuals in the composition of their gen…
42 terms
Chapter 23 The Evolution of Populations
What is microevolution?
What are the 3 main mechanisms that ca…
Why is variation important?
Genetic Variation
Microevolution is evolutionary change below the species level…
Natural selection, Genetic drift, & Gene flow
Individuals differed in their inherited traits & that selecti…
differences among individuals in the composition of their gen…
What is microevolution?
Microevolution is evolutionary change below the species level…
What are the 3 main mechanisms that ca…
Natural selection, Genetic drift, & Gene flow
18 terms
Chapter 23 Evolution of Populations
microevolution
macroevolution
population
population genetics
Change in genetic makeup of a population from generation to g…
The development of a new species
Group of individuals of the same species living in the same a…
Study of allele frequency distribution and change under the i…
microevolution
Change in genetic makeup of a population from generation to g…
macroevolution
The development of a new species
35 terms
CHAPTER 23 - THE EVOLUTION OF POPULATIONS
adaptive evolution
allele
bottleneck effect
directional selection
favoring some alleles over others, results in a better match…
alternative versions of the same gene
severe drop in population passed through a bottle that may dr…
conditions favor individuals exhibiting one extreme of a phen…
adaptive evolution
favoring some alleles over others, results in a better match…
allele
alternative versions of the same gene
31 terms
Chapter 23 - Evolution of Populations (Evolution)
Allele
Diploid Species
Haploid
Polyploid
version of a gene
recessive alleles can be maintained, even if they are deleter…
single set of chromosomes
containing more than two sets of homologous chromosomes
Allele
version of a gene
Diploid Species
recessive alleles can be maintained, even if they are deleter…
49 terms
Chapter 23: Evolution of population
microevolution
4 mechanisms of evolution
genetic variation
how can gene variability be quantified?
change in allele frequencies in a population over generations
natural selection ... genetic drift (chance events) ... gene flow:…
differences among individuals in their composition of genes o…
the ave percent of ioci that are heterozygous
microevolution
change in allele frequencies in a population over generations
4 mechanisms of evolution
natural selection ... genetic drift (chance events) ... gene flow:…
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