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Study sets matching "populations speciation"

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Study sets matching "populations speciation"

34 terms
Speciation/Population
Speciation
Reproductive Isolation
Behavioral Isolation
Geographical Isolation
The formation of a new species.
Separation of species or populations so that they cannot bree…
The animals are different. They act different. So they do not…
There is a physical barrier that prevents two animals from re…
Speciation
The formation of a new species.
Reproductive Isolation
Separation of species or populations so that they cannot bree…
20 terms
Populations and speciation
Stabilizing selection
Heterozygote advantage
Genetic drift
Gene flow
Natural selection that acts gainst extreme phenotypes and fav…
A phenomenon in whoch the heterozygous condition confers some…
Random change in gene frequency in a small, isolated population
Movement of alleles between local populations, or demes, due…
Stabilizing selection
Natural selection that acts gainst extreme phenotypes and fav…
Heterozygote advantage
A phenomenon in whoch the heterozygous condition confers some…
11 terms
Populations and Speciation
Effects of genotype a and phenotypes t…
Gene pool
Allele frequency
Definition of evolution relating genet…
Natural selection acts directly on phenotype not genotype
All genes present in population
# of times an allele occur in gene pool compared to ones pres…
Evolution occurs when any change to frequency of alleles in p…
Effects of genotype a and phenotypes t…
Natural selection acts directly on phenotype not genotype
Gene pool
All genes present in population
Evolution of Populations and Speciation Review
evolution
natural selection
sources of variation
single-gene traits
Change in heritable traits over time.
Mechanism that helps explain evolution by which individuals t…
1. Sexual reproduction... 2. Mutations... 3. Gene flow
Traits controlled by one gene.... Examples: Tongue rolling and…
evolution
Change in heritable traits over time.
natural selection
Mechanism that helps explain evolution by which individuals t…
20 terms
Population & Speciation
False
True
Frequency of alleles
Gene pool
Individuals do evolve
Evolution requires that genetic changes are passed from one g…
A population can be characterized by_______for a given trait ?
The sum of all the alleles for all traits in a sexually repro…
False
Individuals do evolve
True
Evolution requires that genetic changes are passed from one g…
57 terms
Populations & Speciation (multiple choice)
phenotypic frequency
gene flow
movement of genes from one population…
directional selection
the number of individuals with a particular phenotype divided…
the movement of alleles into or out of a population due to mi…
gene flow describes the
a change in the frequency of a particular gene in one directi…
phenotypic frequency
the number of individuals with a particular phenotype divided…
gene flow
the movement of alleles into or out of a population due to mi…
Evolution, Population Genetics and Speciation
fossil
adaptation
fitness
natural selection
the preserved remains or traces of an organism that lived in…
a trait that improves an individual's ability to survive and…
ability of an individual to successfully reproduce in its env…
the process by which individuals that are better adapted to t…
fossil
the preserved remains or traces of an organism that lived in…
adaptation
a trait that improves an individual's ability to survive and…
29 terms
Chapter 16 The Evolution Of Populations and Speciation
Allele Frequency
Mutation
Genetic drift
Hardy-Weinberg Equilibrium
number of times allele occurs in gene pool divided by total n…
a random change in the DNA of a gene
allele frequencies in a population change as a result of rand…
shows that allele frequencies in a population tend to remain…
Allele Frequency
number of times allele occurs in gene pool divided by total n…
Mutation
a random change in the DNA of a gene
14 terms
populations & speciation - matching 1
anagenesis
anagenesis
vestigial structures
vestigial structures
transformation of an entire population through time
phyletic evolution
rudimentary structures of limited use
a snake pelvis
anagenesis
transformation of an entire population through time
anagenesis
phyletic evolution
9 terms
populations & speciation - matching 2
behavioral
behavioral
behavioral
geographical
distinctive mating rituals
no response to mating call
differences in pheromones
physical separation
behavioral
distinctive mating rituals
behavioral
no response to mating call
5 terms
populations & speciation - matching 3
parapatric speciation
adaptive radiation
allopatric speciation
sympatric speciation
adjacent populations hybridize along a common border
numerous species arise from a primitive, unspecialized ancest…
new species form during geographical isolation
a new species arise in the midst of the parent population; re…
parapatric speciation
adjacent populations hybridize along a common border
adaptive radiation
numerous species arise from a primitive, unspecialized ancest…
39 terms
Evolution of Populations and Speciation
microevolution and macroevolution
microevolution
macroevolution
microevolution
two levels of evolution
Occurs at the population level and affects allele frequencies
refers to evolutionary change at or above the species level
evolutionary changes within a population
microevolution and macroevolution
two levels of evolution
microevolution
Occurs at the population level and affects allele frequencies
16 terms
Evolution in Populations and Speciation
species
gene pool
microevolution
Hardy-Weinberg
group of populations whose members are capable of interbreedi…
total collection of genes in a population at any time
change in the gene pool over generations
allele and genotype frequencies tend to remain the same unles…
species
group of populations whose members are capable of interbreedi…
gene pool
total collection of genes in a population at any time
15 terms
Evolution of Populations and Speciation Review
evolution
natural selection
sources of variation
gene pool
Change in heritable traits over time.
Mechanism that helps explain evolution by which individuals t…
1. Sexual reproduction... 2. Mutations... 3. Gene flow
All the genes in a population.
evolution
Change in heritable traits over time.
natural selection
Mechanism that helps explain evolution by which individuals t…
19 terms
The Evolution of Populations and speciation
Bell curve
Gene Pool
Hardy-Weinberg Genetic equilibrium
Phenotype frequency
A symmetrical bell-shaped curve that represents the distribut…
the stock of different genes in an interbreeding population.
The Hardy-Weinberg principle, also known as the Hardy-Weinber…
A ratio stating the number of times a specific phenotype occu…
Bell curve
A symmetrical bell-shaped curve that represents the distribut…
Gene Pool
the stock of different genes in an interbreeding population.
16 terms
The Evolution of Populations and Speciation
population
frequency of traits*
environment
heredity
members of a species that live in a certain area and make up…
most trait show a bell curve when graphed some organisms show…
availablity of food
do to the the formation of gametes
population
members of a species that live in a certain area and make up…
frequency of traits*
most trait show a bell curve when graphed some organisms show…
40 terms
The Evolution of Populations and Speciation
Population genetics
Population, Evolution
Variation of traits
Bell curve ... Extreme values
The study of evolution from a genetic point of view
___ is the smallest unit in which ___ occurs
Often studies by measuring that trait in a large sample
A ___ illustrates that most members of a population have simi…
Population genetics
The study of evolution from a genetic point of view
Population, Evolution
___ is the smallest unit in which ___ occurs
44 terms
population genetics and speciation
gene pool
allele frequency
how does evolution change allele frequ…
hardy-Weinberg equilibrium
set of all genetic info in a population
number of times that the allele occurs; usually represented b…
new variations will be created, which will change the numbers
no mutation, nongene flow (migration), large population, rand…
gene pool
set of all genetic info in a population
allele frequency
number of times that the allele occurs; usually represented b…
23 terms
The evolution of populations and Speciation
Allele frequency
Bell curve
Gene pool
Hardy-Weinberg genetic equilibrium
Is determined by dividing the number of a certain Allele(five…
A graph of the frequency of length in a population of mature…
Describe the total genetic information available in a populat…
Based on a set of assumptions about an ideal hypothetical pop…
Allele frequency
Is determined by dividing the number of a certain Allele(five…
Bell curve
A graph of the frequency of length in a population of mature…
28 terms
Evolution of Populations and Speciation
Population Genetics
Population
Species
Gene Pool
The study of genetic variation in populations.
Localized group of individuals of the same species.
A group of similar organisms that can interbreed.
The total aggregate of genes in a population.
Population Genetics
The study of genetic variation in populations.
Population
Localized group of individuals of the same species.
21 terms
Population Genetics and Speciation
Population Genetics
Gene Pool
Hardy-Weinberg Genetic Equilibrium
Mutation
The study of evolutiom form a genetic point of veiw
the total genetic info available in a population
Genotype frequency will stay the same unless acted upon by an…
A change in DNA
Population Genetics
The study of evolutiom form a genetic point of veiw
Gene Pool
the total genetic info available in a population
26 terms
Chapter 16 Populations Genetics and Speciation
population genetics
microevolution
population
bell curve
the study of the frequency and interaction of alleles and gen…
Evolution at a genetic level. A change in the collective gene…
The smallest unit in which evolution occurs
a symmetrical frequency curve. Chart looks like a bell.
population genetics
the study of the frequency and interaction of alleles and gen…
microevolution
Evolution at a genetic level. A change in the collective gene…
30 terms
Population Change and Speciation Guide
species
population
Allele frequency
Gene pool
A population whose members can interbreed and produce fertile…
A group of individuals of the same species that mate and prod…
The relative frequency of an allele (variant of a gene) at a…
Consists of all the genes, including all the different allele…
species
A population whose members can interbreed and produce fertile…
population
A group of individuals of the same species that mate and prod…
8 terms
Biology-The Evolution of Populations and Speciation
What are the three causes of variation?
Why is variation important in evolution?
What is the equation for allele freque…
What is the equation for genotype freq…
mutations, recombination, and random fusion of gametes
because variation drives evolution
p (freq. of dominant alleles) + q (frequency of recessive all…
AA + Aa + aa = 1
What are the three causes of variation?
mutations, recombination, and random fusion of gametes
Why is variation important in evolution?
because variation drives evolution
30 terms
Population Change and Speciation Guide
species
population
Allele frequency
Gene pool
A population whose members can interbreed and produce fertile…
A group of individuals of the same species that mate and prod…
The relative frequency of an allele (variant of a gene) at a…
Consists of all the genes, including all the different allele…
species
A population whose members can interbreed and produce fertile…
population
A group of individuals of the same species that mate and prod…
31 terms
science evolution of populations and speciation
define and describe a population
what is a gene pool? give an example f…
what does allele frequency mean?
what is a mutation? what will it do to…
def: collection of individuals of the same species that routi…
all genes present in a population... ex: the pool of yellow and…
Allele frequency is a measure of the relative frequency of an…
a mutation is a change in DNA and it increases the variation…
define and describe a population
def: collection of individuals of the same species that routi…
what is a gene pool? give an example f…
all genes present in a population... ex: the pool of yellow and…
65 terms
Evolution, Speciation, and Population Genetics
who was Jean Baptise Lamarak
two key points Lamarak discovered
who was Charles Darwin
what was the main mission of the HMS B…
proposed theory for how organisms change over time
1. change due to use/disuse... 2. passing on acquired traits
Charles Darwin promoted natural selection as the method of ev…
to chart the South American Coastline... Darwin discovered that…
who was Jean Baptise Lamarak
proposed theory for how organisms change over time
two key points Lamarak discovered
1. change due to use/disuse... 2. passing on acquired traits
26 terms
Chapter 16: Populations Genetics and Speciation
Population genetics
microevolution
bell curve
gene pool
study of evolution from genetic point of view
change in the collective genetic material of a population
many traits in a population follow the pattern of a bell curve
the genes for all the traits in a population
Population genetics
study of evolution from genetic point of view
microevolution
change in the collective genetic material of a population
29 terms
FLORENCE CH 16 POPULATIONS & SPECIATION
behavioral structures
chance inherited variants
allele frequency
Hardy Weinberg equilibrium
actions that organisms perform to survive (like mating calls,…
inheritance of a random mutation that causes a new genetic va…
the percentage of an allele that occurs in the population
a principle that says if any of 5 rules are broken then evolu…
behavioral structures
actions that organisms perform to survive (like mating calls,…
chance inherited variants
inheritance of a random mutation that causes a new genetic va…
29 terms
Biology- The Evolution of Populations and Speciation
What are population genetics?
What is a population?
What is a bell curve?
What is the gene pool?
how genetics in a population influence evolution
any group of a single species in a specific location
a graph that shows what is called a normal distribution of a…
all the genes in a population
What are population genetics?
how genetics in a population influence evolution
What is a population?
any group of a single species in a specific location
26 terms
Chapter 16: Populations Genetics and Speciation
Population genetics
microevolution
bell curve
gene pool
study of evolution from genetic point of view
change in the collective genetic material of a population
many traits in a population follow the pattern of a bell curve
the genes for all the traits in a population
Population genetics
study of evolution from genetic point of view
microevolution
change in the collective genetic material of a population
Population genetics and Speciation
What are the five mechanisms for popul…
What's convergence?
What's divergence?
What's co evolution?
1)genetic drift... 2)migration ... 3)mutation ... 4)non random mating…
Two different species that adapt the same characteristics but…
The difference in a population that once formed a single popu…
Two or more species changing over time due to each others inf…
What are the five mechanisms for popul…
1)genetic drift... 2)migration ... 3)mutation ... 4)non random mating…
What's convergence?
Two different species that adapt the same characteristics but…
26 terms
Population Genetics and Speciation
Assortative mating
Bottleneck Effect
Coevolution
Directional Selection
selecting a mate that has traits similar to their own
sudden change in environment drastically reduces population s…
two or more species reciprocally affect each other's evolution
conditions favor individuals exhibiting one extreme of a phen…
Assortative mating
selecting a mate that has traits similar to their own
Bottleneck Effect
sudden change in environment drastically reduces population s…
13 terms
population genetics and speciation
Sympatric speciation
speciation
morphology
gradualism
two sub populations become reproductively isolated within the…
Formation of new species
1. scientific study of the forms and structures of plants and…
A proposed explanation in evolutionary biology stating that n…
Sympatric speciation
two sub populations become reproductively isolated within the…
speciation
Formation of new species
Population Genetics and Speciation
Species
Gene pool
Allele frequency
Gene flow
A large group of organisms that can interbreed and produce fe…
A stock of different genes in a interbreeding species
Number of times that an allele occurs in a gene pool compared…
Migration of genes or alleles in out of a population
Species
A large group of organisms that can interbreed and produce fe…
Gene pool
A stock of different genes in a interbreeding species
18 terms
Population Genetica and Speciation
Microevolution
Bell curve
Phenotype frequency
Immigration
A change in the collective genetic material of a population.
Curved line on a graph showing population frequency.
Equal to the number of individuals with a particular phenotyp…
Movement of individuals into a population.
Microevolution
A change in the collective genetic material of a population.
Bell curve
Curved line on a graph showing population frequency.
15 terms
speciation and population genetics
gene flow
nonrandom mating
genetic drift
mutation
individuals that join a population might bring a new gene. in…
individuals may have limited choice in mates or prefer mates…
chance events (fire, flood) can cause rare alleles to be lost…
can create new alleles in a population
gene flow
individuals that join a population might bring a new gene. in…
nonrandom mating
individuals may have limited choice in mates or prefer mates…
34 terms
Population Genetics and Speciation
Hardy-Weinberg Principle of genetic eq…
no natural selection, random mating, n…
Population genetics
Genetic drift
allele frequency does not change
conditions of genetic equilibrium
study of genetic traits and changes in populations
random change in allele frequency due to chance events. Chang…
Hardy-Weinberg Principle of genetic eq…
allele frequency does not change
no natural selection, random mating, n…
conditions of genetic equilibrium
23 terms
Population Genetics and Speciation
Allele Frequency
Allopatric Speciation
Directional Selection
Disruptive Selection
The proportion of gene copies in a population that are a give…
Species arise due to geographic isolation.
A type of natural selection in which the most extreme forms o…
A type of natural selection in which two extreme forms of a t…
Allele Frequency
The proportion of gene copies in a population that are a give…
Allopatric Speciation
Species arise due to geographic isolation.
27 terms
Population Genetics and Speciation
allele frequency equation
genotype frequency equation
species
gene flow
p+q=1
p^2+2pq+q^2
a group of living organisms
individuals entering or leaving a population
allele frequency equation
p+q=1
genotype frequency equation
p^2+2pq+q^2
29 terms
Population, evolution, speciation
Gene pool
Gene
Migration, genetic drift, mutation and…
Mutation
How biological evolution is defined
Sequence of DNA That determines a particular trait
Evolution happens by these four mechanisms
Random change in DNA of a species
Gene pool
How biological evolution is defined
Gene
Sequence of DNA That determines a particular trait
22 terms
Population Genetics and Speciation
Population genetics
Microevolution
Alles
Causes of Variation
Study of evolution from a genetic point of view
Change in the genetic collective material of a population
Variations of genes that code for various traits
Environmental Factors ... Range of phenotypes... Mutations ... Recombi…
Population genetics
Study of evolution from a genetic point of view
Microevolution
Change in the genetic collective material of a population
26 terms
Population Genetics and Speciation
Population Genetics
A change in the collective gene
Bell Curve
Mutations
The study of evolution from a genetic point of view
A change in the collective genetic material of a population
Shows variation that follows a pattern
Random change in a gene, that is passed on to offspring.
Population Genetics
The study of evolution from a genetic point of view
A change in the collective gene
A change in the collective genetic material of a population
30 terms
Population Genetics and Speciation
allele frequency
Bottleneck Effect
Founder Effect
Gene Pool
the percentage of any specific allele in a gene pool
sudden change in environment drastically reduces population s…
a few individuals isolated from larger population
total alleles available in a population
allele frequency
the percentage of any specific allele in a gene pool
Bottleneck Effect
sudden change in environment drastically reduces population s…
15 terms
Population Genetics and Speciation
Stabilizing selection
Directional selection
Diversifying selection
The 5 condition required to maintain a…
conditions favor the more common, intermediate genotype. A re…
conditions favor a genotype which may initially have been rel…
Environmental conditions favor genotypes on both extremes. Th…
The population size must be large... There can be no movement in…
Stabilizing selection
conditions favor the more common, intermediate genotype. A re…
Directional selection
conditions favor a genotype which may initially have been rel…
Population Genetics and Speciation
Morphology
Reproductive Isolation
Evolution
Gene Flow
An organism's structure and appearance
Anatomical barriers to successful breeding
Changes in a population's genetic material; consequence of vi…
Movement of genes between populations
Morphology
An organism's structure and appearance
Reproductive Isolation
Anatomical barriers to successful breeding
18 terms
Population Genetics and Speciation
Polygenic
Gene flow
Genetic drift
Hardy-Wienberg principle
A trait that is influence by several genes
Evolutionary forces include the mutation of genes which is th…
Small populations, the frequency of an allele can be greatly…
Frequency of alleles in a population do not change unless evo…
Polygenic
A trait that is influence by several genes
Gene flow
Evolutionary forces include the mutation of genes which is th…
15 terms
speciation and population genetics
gene flow
nonrandom mating
genetic drift
mutation
individuals that join a population might bring a new gene. in…
individuals may have limited choice in mates or prefer mates…
chance events (fire, flood) can cause rare alleles to be lost…
can create new alleles in a population
gene flow
individuals that join a population might bring a new gene. in…
nonrandom mating
individuals may have limited choice in mates or prefer mates…
52 terms
Population Genetics Speciation
Gene Pool
Allele Frequency
Evolution Changing Allele Frequencies
Hard-Weinberg Equilibrium
All the genes within a population, including the alleles for…
The number of times an allele occurs in a gene pool, compared…
Environment will act on a certain phenotype which results in…
No mutations; no gene flow (migration); random mating; large…
Gene Pool
All the genes within a population, including the alleles for…
Allele Frequency
The number of times an allele occurs in a gene pool, compared…
26 terms
Population Genetics and Speciation
population genetics
microevolution
bell curve
gene pool
the study of evolution from a genetic point of view.
change in the collective genetic material of a population
the plot of frequencies obtained for many psychological tests…
combined genetic information of all the members of a particul…
population genetics
the study of evolution from a genetic point of view.
microevolution
change in the collective genetic material of a population
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