Notes 9.4 – DISRUPTING HWE EQUILIBRIUM
... 3. Genetic Drift Genetic Drift - The amount of an allele changes due to random events ...
... 3. Genetic Drift Genetic Drift - The amount of an allele changes due to random events ...
Mechanisms of Evolution
... genetic disorder due to the fact that there has not been a lot of genetic variation added. This trait is present in this population at a higher than normal rate (7% as opposed to ...
... genetic disorder due to the fact that there has not been a lot of genetic variation added. This trait is present in this population at a higher than normal rate (7% as opposed to ...
Chapter 16 - Net Start Class
... C. Speciation in Darwin’s Finches 1. Founders Arrive-birds arrive from S. America perhaps blown there by a storm 2. Separation of Populations-The small population is separated on different islands. 3. Changes in the Gene Pool-Natural variation due to mutation occurs 4. Reproductive Isolation-Birds a ...
... C. Speciation in Darwin’s Finches 1. Founders Arrive-birds arrive from S. America perhaps blown there by a storm 2. Separation of Populations-The small population is separated on different islands. 3. Changes in the Gene Pool-Natural variation due to mutation occurs 4. Reproductive Isolation-Birds a ...
building trees
... You can determine omega for the whole dataset; however, usually not all sites in a sequence are under selection all the ...
... You can determine omega for the whole dataset; however, usually not all sites in a sequence are under selection all the ...
The exam will consist of multiple choice, true-false, “fill
... The following is by no means everything on the test. This guide emphasizes main topics that are covered on the test in one fashion or another. Review your lecture notes in detail and the textbook to clarify and expand on concepts discussed in class. Study groups can help because you will really lear ...
... The following is by no means everything on the test. This guide emphasizes main topics that are covered on the test in one fashion or another. Review your lecture notes in detail and the textbook to clarify and expand on concepts discussed in class. Study groups can help because you will really lear ...
Gene pool and evolution PPT
... Natural selection… is the process by which those ______________that make it more likely for an ______________ to survive and successfully ______________ become more common in a ______________ over successive generations. It is a key mechanism of ...
... Natural selection… is the process by which those ______________that make it more likely for an ______________ to survive and successfully ______________ become more common in a ______________ over successive generations. It is a key mechanism of ...
Natural Selection March , 2.009 * 103
... Mutations occur all the time. They can either INCREASE FITNESS, DECREASE FITNESS, or NOT CHANGE FITNESS. ...
... Mutations occur all the time. They can either INCREASE FITNESS, DECREASE FITNESS, or NOT CHANGE FITNESS. ...
Classical Model of Selection at a Single Locus
... CLASSICAL MODEL OF SELECTION AT A SINGLE LOCUS THE MODEL: Same conditions as Hardy-Weinberg, but with selection included. Genetic system: 1) diploid population 2) sexual reproduction 3) random mating Selection 1) identical selection in both sexes 2) viability selection 3) constant selection on each ...
... CLASSICAL MODEL OF SELECTION AT A SINGLE LOCUS THE MODEL: Same conditions as Hardy-Weinberg, but with selection included. Genetic system: 1) diploid population 2) sexual reproduction 3) random mating Selection 1) identical selection in both sexes 2) viability selection 3) constant selection on each ...
Ch 023 evolupop
... selection, is the relative contribution an individual makes to the gene pool of the next generation. •Relative Fitness: contribution of a genotype to the next generation compared to another. Based as a % based on best reproductive member (1). ...
... selection, is the relative contribution an individual makes to the gene pool of the next generation. •Relative Fitness: contribution of a genotype to the next generation compared to another. Based as a % based on best reproductive member (1). ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
... 5. The following does not play and part in evolution a) Mutation b) Polyploidy c) Natural Selection d) Acquired Characters II. State whether the following statements are true or false ...
... 5. The following does not play and part in evolution a) Mutation b) Polyploidy c) Natural Selection d) Acquired Characters II. State whether the following statements are true or false ...
How Does Evolution Work?
... When organisms from one population migrate to another population, they change the composition of the gene pool of both populations Example: If ...
... When organisms from one population migrate to another population, they change the composition of the gene pool of both populations Example: If ...
Biology Evolution Review Sheeet 1. Differentiate between artificial
... Differentiate between homologous and analogous structures. Give an example of each. Homologous structures are those that develop from the same tissue in the developing embryo, whether or not the mature forms resemble each other (they usually don’t look a lot alike). The human arm and the wing of a b ...
... Differentiate between homologous and analogous structures. Give an example of each. Homologous structures are those that develop from the same tissue in the developing embryo, whether or not the mature forms resemble each other (they usually don’t look a lot alike). The human arm and the wing of a b ...
Chapter 15: The Theory of Evolution - Honors Biology 10 - 2222-03
... What causes the genes in one gene pool to change? 1. Mutations that occur by change or by radiation and chemicals 2. Genetic drift: when allelic frequencies are changed by random events in a isolated population o Amish population in Pennsylvania tend to marry and have children within the population ...
... What causes the genes in one gene pool to change? 1. Mutations that occur by change or by radiation and chemicals 2. Genetic drift: when allelic frequencies are changed by random events in a isolated population o Amish population in Pennsylvania tend to marry and have children within the population ...
Chapter 15: The Theory of Evolution
... English scientist that lived from 1809-1882 Proposed the theory of evolution o Evolution: gradual change in a species through adaptations over time o Theory of evolution = natural selection o Natural selection: Organisms with traits well suited to an environment are more likely to survive and pr ...
... English scientist that lived from 1809-1882 Proposed the theory of evolution o Evolution: gradual change in a species through adaptations over time o Theory of evolution = natural selection o Natural selection: Organisms with traits well suited to an environment are more likely to survive and pr ...
Evolution Test Study Guide
... 43. What factor would most likely disrupt frequency (shape of bell curve) in a large population? 44. T/F: The most important factor that is necessary for the formation of a new species from an existing species population is reproductive isolation. 45. What can phenotypes (looks) for a typical polyge ...
... 43. What factor would most likely disrupt frequency (shape of bell curve) in a large population? 44. T/F: The most important factor that is necessary for the formation of a new species from an existing species population is reproductive isolation. 45. What can phenotypes (looks) for a typical polyge ...
biol2007 - evolution in space and time
... A consistent change in gene frequency heritable phenotype, across a geographical range is known as a cline Clines occur because dispersal across a region is limited, because the whole geographical area does not form a ...
... A consistent change in gene frequency heritable phenotype, across a geographical range is known as a cline Clines occur because dispersal across a region is limited, because the whole geographical area does not form a ...
BSU Ch 14 Evolution Test Study Guide
... 43. What factor would most likely disrupt frequency (shape of bell curve) in a large population? 44. T/F: The most important factor that is necessary for the formation of a new species from an existing species population is reproductive isolation. 45. What can phenotypes (looks) for a typical polyge ...
... 43. What factor would most likely disrupt frequency (shape of bell curve) in a large population? 44. T/F: The most important factor that is necessary for the formation of a new species from an existing species population is reproductive isolation. 45. What can phenotypes (looks) for a typical polyge ...
Document
... Male northern sea lions are nearly twice the size of females because a. males live longer than females. b. predators of the sea lions favor males. c. males compete to mate with females. d. each male must protect the one female with which he mates. e. all of these. The HbS allele (sickle cell) occurs ...
... Male northern sea lions are nearly twice the size of females because a. males live longer than females. b. predators of the sea lions favor males. c. males compete to mate with females. d. each male must protect the one female with which he mates. e. all of these. The HbS allele (sickle cell) occurs ...
microevolution
... • Bottleneck effect – The change in allele frequency in a population due to chance following a sharp reduction in the population size. • Founder effect – When a small portion of a population migrates to another area, starting a new population. ...
... • Bottleneck effect – The change in allele frequency in a population due to chance following a sharp reduction in the population size. • Founder effect – When a small portion of a population migrates to another area, starting a new population. ...
Group selection
Group selection is a proposed mechanism of evolution in which natural selection is imagined to act at the level of the group, instead of at the more conventional level of the individual.Early authors such as V. C. Wynne-Edwards and Konrad Lorenz argued that the behavior of animals could affect their survival and reproduction as groups.From the mid 1960s, evolutionary biologists such as John Maynard Smith argued that natural selection acted primarily at the level of the individual. They argued on the basis of mathematical models that individuals would not altruistically sacrifice fitness for the sake of a group. They persuaded the majority of biologists that group selection did not occur, other than in special situations such as the haplodiploid social insects like honeybees (in the Hymenoptera), where kin selection was possible.In 1994 David Sloan Wilson and Elliott Sober argued for multi-level selection, including group selection, on the grounds that groups, like individuals, could compete. In 2010 three authors including E. O. Wilson, known for his work on ants, again revisited the arguments for group selection, provoking a strong rebuttal from a large group of evolutionary biologists. As of yet, there is no clear consensus among biologists regarding the importance of group selection.