Study sets matching "population evolution"

Study sets
Classes
Users

Study sets matching "population evolution"

30 terms
Population Evolution
Population evolution encompasses what…
Genetic Drift
What size population is most affected…
What process contributes to gene flow?
1. Genetic Drift... 2. Gene Flow... 3. Nonrandom mating... 4. Mutation…
Random changes in gene variation in a population
Small populations
Migration
Population evolution encompasses what…
1. Genetic Drift... 2. Gene Flow... 3. Nonrandom mating... 4. Mutation…
Genetic Drift
Random changes in gene variation in a population
27 terms
Evolution of Population
Gene pool
Directional selection
Stabilizing selection
Disruptive selection
all genes, including all the different alleles, that are pres…
when individuals at one end of a distribution curve have high…
when individuals near the center of a distribution curve have…
natural selection that favors individuals at either extreme o…
Gene pool
all genes, including all the different alleles, that are pres…
Directional selection
when individuals at one end of a distribution curve have high…
23 terms
The Evolution of Populations
Allele
Gene
Gene pool
Population
Alternative forms of a gene for each variation of a trait of…
A segment of DNA on a chromosome that codes for a specific tr…
All the genes, including all the different alleles for each g…
A group of individuals that belong to the same species and li…
Allele
Alternative forms of a gene for each variation of a trait of…
Gene
A segment of DNA on a chromosome that codes for a specific tr…
25 terms
Population Evolution
Misconceptions of Evolutions
Influences on Evolution
Non-inherited Variations
Sources of Genetic Variations
-individuals do not evolve, populations do... -We can examine mi…
-genetic variation is the representation of different phenoty…
-not all phenotypic variation is heritable... -many phenotypes a…
1) formation of new alleles... 2) Altering gene #/ position... 3) R…
Misconceptions of Evolutions
-individuals do not evolve, populations do... -We can examine mi…
Influences on Evolution
-genetic variation is the representation of different phenoty…
11 terms
population evolution
population evolution
frequencies expressed as..
in darwin's eyes evolution was a..
what is the mathematic definition of e…
shows evolution as a change in gene frequencies of a populati…
as a definition
talent
change in allele frequencies
population evolution
shows evolution as a change in gene frequencies of a populati…
frequencies expressed as..
as a definition
37 terms
Evolution in populations
Directional Selection
Disruptive Selection
Stabilizing Selection
Phenotype
favors ONE extreme
favors BOTH extremes
favors the AVERAGE phenotype
THIS is what natural selection acts on in an organism
Directional Selection
favors ONE extreme
Disruptive Selection
favors BOTH extremes
10 terms
Population Evolution
Genetic Variation
Mutation
Natural Selection
Stabilizing Selection
Variety in the alleles of genes within and among populations.
Any change in the nucleotide sequence of an organism's DNA.
Individuals in a population exhibit variation in their herita…
Favoring of the intermediate phenotypes in a population.
Genetic Variation
Variety in the alleles of genes within and among populations.
Mutation
Any change in the nucleotide sequence of an organism's DNA.
27 terms
Population Evolution
gene pool
allele frequency
phenotype frequency
a population is constant...
the total genetic information in a population
divide the occurrence of a desired allele by the total number…
divide the occurrence of a phenotype by the total number of o…
...until influenced
gene pool
the total genetic information in a population
allele frequency
divide the occurrence of a desired allele by the total number…
30 terms
Population Evolution
Population evolution encompasses what…
Genetic Drift
What size population is most affected…
What process contributes to gene flow?
1. Genetic Drift... 2. Gene Flow... 3. Nonrandom mating... 4. Mutation…
Random changes in gene variation in a population
Small populations
Migration
Population evolution encompasses what…
1. Genetic Drift... 2. Gene Flow... 3. Nonrandom mating... 4. Mutation…
Genetic Drift
Random changes in gene variation in a population
32 terms
Population evolution
adaptive radiation
behavioral isolation
bottleneck effect
coevolution
when organism evolve and fit all parts of an ecosystem: live…
members of a population start to act differently and stop bre…
a disaster wipes out part of a population and the gene freque…
when organisms live together and evolve together (coral and t…
adaptive radiation
when organism evolve and fit all parts of an ecosystem: live…
behavioral isolation
members of a population start to act differently and stop bre…
13 terms
Population evolution
modern synthesis
microevolution
macroevolution
evolution
The coherent understanding of the relationship between natura…
Change below the species level. Change in allele frequencies…
Change above the species level. Microevolution + billions of…
The change in a line of descent over time
modern synthesis
The coherent understanding of the relationship between natura…
microevolution
Change below the species level. Change in allele frequencies…
47 terms
Evolution and Population
evolution
Darwin
Speciation
Directional Selection curve
Change in a kind of organism over time; process by which mode…
English natural scientist who formulated a theory of evolutio…
Formation of a new species
Form of natural selection in which the entire curve moves; oc…
evolution
Change in a kind of organism over time; process by which mode…
Darwin
English natural scientist who formulated a theory of evolutio…
Evolution of Populations
gene pool
allele frequency
single-gene trait
polygenic trait
All the genes in a population at any one time
how often a form of a gene appears in a gene pool
trait controlled by a single gene that has two alleles
Traits controlled by two or more genes
gene pool
All the genes in a population at any one time
allele frequency
how often a form of a gene appears in a gene pool
Evolution and Population
Population
Gene Pool
Relative Frequencey
Mutation
Is a collection of individuals of the same species in a given…
Is the combined genetic information of all the members of a p…
It is the amount of times that one allele occurs in a gene po…
Any change in the genetic sequence of DNA
Population
Is a collection of individuals of the same species in a given…
Gene Pool
Is the combined genetic information of all the members of a p…
14 terms
Evolution of population
population
Gene pool
Allele frequency
Evolution
Group of organisms of the same species
All the genes that are present in a population
the number of times an allele occurs in a gene pool
change in frequency of alleles in a population over time
population
Group of organisms of the same species
Gene pool
All the genes that are present in a population
28 terms
Evolution of Population
Gene pool
Directional selection
Stabilizing selection
Disruptive selection
all genes, including all the different alleles, that are pres…
when individuals at one end of a distribution curve have high…
when individuals near the center of a distribution curve have…
natural selection that favors individuals at either extreme o…
Gene pool
all genes, including all the different alleles, that are pres…
Directional selection
when individuals at one end of a distribution curve have high…
Evolution: Darwin and population genetics
Aristotle
Leonardo da Vinci
Lamarck
inner drive
scale of nature to a more perfect state
said "fossils are remains of once living organisms"
inheritance of acquired characteristics
organisms have a vital force to improve themselves
Aristotle
scale of nature to a more perfect state
Leonardo da Vinci
said "fossils are remains of once living organisms"
25 terms
POPULATION EVOLUTION
mutation
diploidy
quantitative characters
discrete characters
ultimate source of new alleles
having 2 alleles for one trait
traits vary along a continuum
traits are either/or
mutation
ultimate source of new alleles
diploidy
having 2 alleles for one trait
Population Evolution
What is the population Evolution
the stock of different genes in an int…
Genetic Isolation, Migration (gene flo…
the process whereby organisms better a…
Effects of population size, Gene Pool, Factors that affect al…
Gene pool
Factors that affect allele frequency
Natural Selection
What is the population Evolution
Effects of population size, Gene Pool, Factors that affect al…
the stock of different genes in an int…
Gene pool
61 terms
Evolution/ population
Biological evolution
Darwin
Natural selection
Fossils
How earths life changes over time through changes in the gene…
Origin of species
Individual with certain traits are more likely to survive and…
Physical evidence of ancient organisms ... Reveal what their ext…
Biological evolution
How earths life changes over time through changes in the gene…
Darwin
Origin of species
Evolution & Population
adaptive radiation
allele frequencies
allopatric speciation
artificial selection
the evolution of several divergent forms from a primitive and…
a measure of the occurrence of an allele in a population, exp…
the differentiation of geographically isolated populations in…
change in the genetic structure of populations due to selecti…
adaptive radiation
the evolution of several divergent forms from a primitive and…
allele frequencies
a measure of the occurrence of an allele in a population, exp…
32 terms
Population evolution
Population
Gene pool
Relative frequency
A percentage
A group of individuals of the same species that can interbree…
What consists of all the genes present in a population includ…
What is the number of times that an allele occurs in the gene…
What is relative frequency often expressed as
Population
A group of individuals of the same species that can interbree…
Gene pool
What consists of all the genes present in a population includ…
7 terms
Population Evolution
Gene Pool
Gene Flow (migration)
Genetic Drift
5 Conditions for Hardy-Weinberg
set of all genes in a population
movement of genes from one population to another
random changes in the gene variants Ex. killing ants
1) no mutations... 2) no gene flow... 3)random mating... 4)large popul…
Gene Pool
set of all genes in a population
Gene Flow (migration)
movement of genes from one population to another
58 terms
POPULATION EVOLUTION
Alfred Wallace
Charles Lyell
Jean Baptiste Lamarck
Thomas Malthus
created an almost identical theory to Darwin's
wrote "Principles of Geology" which inspired Darwin
proposed the idea of acquired traits
wrote about human suffering, human population is increasing f…
Alfred Wallace
created an almost identical theory to Darwin's
Charles Lyell
wrote "Principles of Geology" which inspired Darwin
Population Evolution
Genetic Drift
Founder Effect
Bottleneck Effect
Gene Flow
Any change in alleic frequencies, usually is a loss of geneti…
A small sample of the population separates from the original…
A population declines to very low numbers, then rebounds (los…
Genes coming into a population, migration into a population (…
Genetic Drift
Any change in alleic frequencies, usually is a loss of geneti…
Founder Effect
A small sample of the population separates from the original…
19 terms
Population Evolution
Genus
Species
Binomial nomenclature
Isotope
The usual major subdivision of a family or subfamily
The major subdivision of a genus or sub genus
Two terms used to denote a species
An element with different variations of the number of neutrons
Genus
The usual major subdivision of a family or subfamily
Species
The major subdivision of a genus or sub genus
58 terms
POPULATION EVOLUTION
Alfred Wallace
Charles Lyell
Jean Baptiste Lamarck
Thomas Malthus
created an almost identical theory to Darwin's
wrote "Principles of Geology" which inspired Darwin
proposed the idea of acquired traits
wrote about human suffering, human population is increasing f…
Alfred Wallace
created an almost identical theory to Darwin's
Charles Lyell
wrote "Principles of Geology" which inspired Darwin
15 terms
Evolution population
Gene pool
Gene flow
Divergent evolution
Bottleneck effect
Combine alleles of all the individual I'm a population
Movement of alleles from one population to another
Two species that are closely related become increasingly diff…
Genetic drift that occurs after an event greatly reduced the…
Gene pool
Combine alleles of all the individual I'm a population
Gene flow
Movement of alleles from one population to another
Population evolution
daphne major island (galapagos)
Microevolution
3 mechanisms causing allele frequency…
Genetic variation is caused by
During drough finches with larger beaks more likeley to crack…
Change in allele frequencies in a population over generations
1) natural selection... 2) genetic drift... 3) gene flow
1) DNA mutation... 2) change in gene location or duplication... 3)…
daphne major island (galapagos)
During drough finches with larger beaks more likeley to crack…
Microevolution
Change in allele frequencies in a population over generations
26 terms
Population Evolution
What is the smallest unit that can evo…
If no evolution is occurring in a popu…
Gene pool
Hardy-Weinberg equilibrium
A population
...allele frequencies should remain the same
All the available alleles in a population
When a population is not evolving
What is the smallest unit that can evo…
A population
If no evolution is occurring in a popu…
...allele frequencies should remain the same
14 terms
Evolution & Population
Genetic Drift
Founder Effect
Bottleneck Effect
Charles Darwin
A change in the allele frequency of a population as a result…
Genetic drift that occurs when a few individuals become isola…
Genetic drift resulting from the reduction of a population, t…
1809-1882 English naturalist and scientist whose theory of ev…
Genetic Drift
A change in the allele frequency of a population as a result…
Founder Effect
Genetic drift that occurs when a few individuals become isola…
29 terms
Population Evolution
Population
Microevolution
Phenotypic plasticity
Discrete characters
a localized group of individuals that are capable of interbre…
change in allele frequencies in a population over generations
the expression of different phenotypes in response to environ…
can be classified on an either-or basis
Population
a localized group of individuals that are capable of interbre…
Microevolution
change in allele frequencies in a population over generations
29 terms
Evolution of Populations
Temporal
Geographic/Ecological
Genetic Equilibrium
Hardy-Weinberg Equilibrium
Isolation when populations mate at different times of the yea…
Isolation that results from physical barriers preventing indi…
When the allele frequencies in a population are unchanging
Theory created by two scientists that measures genetic equili…
Temporal
Isolation when populations mate at different times of the yea…
Geographic/Ecological
Isolation that results from physical barriers preventing indi…
Population Evolution
Gene pool
Gene frequency
Mutation
Recombination
Genetic variation stored in population
How often an allele shows up in a population
Random change in DNA
New allele combination forming in offspring (e.g. Meiosis / C…
Gene pool
Genetic variation stored in population
Gene frequency
How often an allele shows up in a population
Evolution & Populations
natural selection
• Wrote "On the Origin of Species"... • P…
binomial nomenclature
evolution
The accepted mechanism of evolution:... • Populations tend to gr…
Charles Darwin
• System of naming organisms developed by Carolus Linnaeus... •…
the change in frequency of alleles in a given population
natural selection
The accepted mechanism of evolution:... • Populations tend to gr…
• Wrote "On the Origin of Species"... • P…
Charles Darwin
17 terms
Population Evolution
Mutation
Point Mutation
Spontaneous Mutation
Gene Flow
A random change in a gene or chromosome, creating a new trait…
Replacement of a single nitrogen base, which may or may not a…
Random changes in DNA that occur during cell division.
The exchange of alleles between two populations
Mutation
A random change in a gene or chromosome, creating a new trait…
Point Mutation
Replacement of a single nitrogen base, which may or may not a…
16 terms
Evolution/ Population
gene pool
relative frequency
single-gene trait
polygenic traits
a set of all genes, in any population
how often something happens divided by all outcomes
trait controlled by a single gene trait that has 2 alleles
trait controlled by 2 or more genes
gene pool
a set of all genes, in any population
relative frequency
how often something happens divided by all outcomes
26 terms
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
25 terms
The Evolution of Populations
Gene Pool
Allele Frequency
Normal Distribution
Microevolution
combined alleles of all the individuals in a population
how common a certain allele is in the population
frequency is highest near the mean value and decreases toward…
observable change in the allele frequencies of a population o…
Gene Pool
combined alleles of all the individuals in a population
Allele Frequency
how common a certain allele is in the population
10 terms
Evolution and Populations
J curve
Limiting factor
abiotic factors
biotic factors
represents exponential growth
The "deal breaker" - if this abiotic or biotic factor is miss…
nonliving; examples would be oxygen, water, gases, sunlight,…
living; examples would be plants, animals, humans, etc...
J curve
represents exponential growth
Limiting factor
The "deal breaker" - if this abiotic or biotic factor is miss…
The Evolution of Populations
Gene Pool
Alllele frequency
Normal distribution
Microevolution
The combined alleles of all of the individuals in a population.
A measure of how common a certain allele is in the population.
A type of distribution in which a frequency is highest near t…
The observable change in the allele frequencies of a populati…
Gene Pool
The combined alleles of all of the individuals in a population.
Alllele frequency
A measure of how common a certain allele is in the population.
Population Evolution
Population evolution encompasses what…
Genetic Drift
What size population is most affected…
What process contributes to gene flow?
1. Genetic Drift... 2. Gene Flow... 3. Nonrandom mating... 4. Mutation…
Random changes in gene variation in a population
Small populations
Migration
Population evolution encompasses what…
1. Genetic Drift... 2. Gene Flow... 3. Nonrandom mating... 4. Mutation…
Genetic Drift
Random changes in gene variation in a population
25 terms
Population Evolution
Adaption
Adaptive Radiation
Behavioral Isolation
Macro Evolution
A characteristic that improves an individual's ability to sur…
The emergence of numerous species from one common ancestor in…
An evolutionary mechanism that helps members of the same spec…
Evolution on a large scale, this leads to the formation of ne…
Adaption
A characteristic that improves an individual's ability to sur…
Adaptive Radiation
The emergence of numerous species from one common ancestor in…
Population Evolution
Microevolution
3 mechanisms cause allele frequency ch…
Variation in ___ leads to variation in…
Genetic variation is caused by....
A change in allele frequencies in a pop. over generations
1. Natural selection... 2. Genetic drift... 3. Gene flow... *only natu…
Genotype. Phenotype ... *not all phenotypic variation is heritable
1. DNA mutation... 2. Change in gene location or duplication... 3.…
Microevolution
A change in allele frequencies in a pop. over generations
3 mechanisms cause allele frequency ch…
1. Natural selection... 2. Genetic drift... 3. Gene flow... *only natu…
37 terms
Population Evolution
Adaptation
Species
Evolution
Fossils
In a popoulation, favorable and heritable traits that allow o…
(biology) taxonomic group whose members can interbreed
change in heritable traits in a population over generations
suggest that species changed over time,
Adaptation
In a popoulation, favorable and heritable traits that allow o…
Species
(biology) taxonomic group whose members can interbreed
8 terms
EVOLUTION OF POPULATION
MUTATION
GENE FLOW
GENETIC DRIFT
BOTTLENECK EFFECT
ANY CHANGE IN THE NUCLEOTIDE SEQUENCE OF AN ORGANISM'S DNA
WHEN THE GENES OF ONE POPULATION ARE INTRODUCED INTO THE gene…
CHANGES IN ALLELE FREQUENCIES FROM ONE GENERATION TO THE NEXT
A TYPE OF GENETIC DRIFT THAT OCCURS WHEN THERE IS A SUDDEN AN…
MUTATION
ANY CHANGE IN THE NUCLEOTIDE SEQUENCE OF AN ORGANISM'S DNA
GENE FLOW
WHEN THE GENES OF ONE POPULATION ARE INTRODUCED INTO THE gene…
Evolution of Population
_____________________ are hypotheses a…
_____________________ is the evolution…
_____________________ is a common trai…
_____________________ arise when group…
evolutionary trees; homologies
convergent evolution; analogy
analogy
analogous traits
_____________________ are hypotheses a…
evolutionary trees; homologies
_____________________ is the evolution…
convergent evolution; analogy
Evolution of Population
Gene Pool
Genetic Variation
Polygenic Traits
Directional Selection
consists of all genes, including all different alleles, that…
...
Many traits are controlled by two or more genes and are, ther…
...
Gene Pool
consists of all genes, including all different alleles, that…
Genetic Variation
...
18 terms
Evolution of Population
Phenotype
Genotype
Dominant Gene
Recessive Gene
The physical traits
The genetic makeup for a specific set of genes
Allele that is expressed
Allele only expressed when 2 copies are present
Phenotype
The physical traits
Genotype
The genetic makeup for a specific set of genes
41 terms
Population Evolution
Natural selection acts on invidiuals w…
alleles code for ______
Directional selection
selection pressure
certain traits
traits
environment changes... a more extreme phenotype is favored
some aspect of the environment that reduces survival and repr…
Natural selection acts on invidiuals w…
certain traits
alleles code for ______
traits
1 of 10