(lectures 5-7) - Felsenstein/Kuhner lab
... In pure genetic drift, the chance that a copy wins this lottery does not depend on which allele it is. The chance that it is one which is A is the same as the fraction of As in the original population. ...
... In pure genetic drift, the chance that a copy wins this lottery does not depend on which allele it is. The chance that it is one which is A is the same as the fraction of As in the original population. ...
Natural Selection and Evidence to Support Evolution
... + expected frequency of the heterozygous genotype + expected frequency of the homozygous recessive genotype ...
... + expected frequency of the heterozygous genotype + expected frequency of the homozygous recessive genotype ...
Population Genetics
... their settlement many years ago. Some alleles are more common in these communities as compared to the rest of the population. This effect is known as ...
... their settlement many years ago. Some alleles are more common in these communities as compared to the rest of the population. This effect is known as ...
CH 23: The Evolution of Populations Terms: Population genetics: is
... neck” in size. By change alone, certain alleles may be overrepresented among the survivors, others may be underrepresented , and some may be absent altogether. 14. Explain why mutation has little quantitative effect on a large population.:: a mutation is a change in an organisums DNA. If a mutation ...
... neck” in size. By change alone, certain alleles may be overrepresented among the survivors, others may be underrepresented , and some may be absent altogether. 14. Explain why mutation has little quantitative effect on a large population.:: a mutation is a change in an organisums DNA. If a mutation ...
Chapter 03
... The Genetic Code • What Genes Are • The Beginnings of Life – Matching Genes – Male or Female? ...
... The Genetic Code • What Genes Are • The Beginnings of Life – Matching Genes – Male or Female? ...
Genetics Notes
... 3. Principle of Independent Assortment – alleles for different characteristics (genes) are distributed to gametes independently. III. Punnett Squares – used to describe the ratio of expected outcomes of a genetic cross. A. Monohybrid cross – (mono meaning one) 1 trait is crossed. 1. Have two allele ...
... 3. Principle of Independent Assortment – alleles for different characteristics (genes) are distributed to gametes independently. III. Punnett Squares – used to describe the ratio of expected outcomes of a genetic cross. A. Monohybrid cross – (mono meaning one) 1 trait is crossed. 1. Have two allele ...
Chromosomes, Genes, and Alleles, oh my
... but will have a slightly different base sequence in one or more locations. Use (and highlight) 2-3 base differences to write a different allele and complementary strand for the gene you wrote. Gene strand Complementary strand 4. The genetic information possessed by an individual makes up their gen ...
... but will have a slightly different base sequence in one or more locations. Use (and highlight) 2-3 base differences to write a different allele and complementary strand for the gene you wrote. Gene strand Complementary strand 4. The genetic information possessed by an individual makes up their gen ...
Making Gametes – The Principle of Independent Assortment
... Name _________________________________________________ Date _______________ Period ______ ...
... Name _________________________________________________ Date _______________ Period ______ ...
Higher Biology - Biodiversity
... Measure/describe species richness data from habitat fragments within the Caledonian Forest or for tiger populations. ...
... Measure/describe species richness data from habitat fragments within the Caledonian Forest or for tiger populations. ...
Natural Selection
... Why? In small populations, Natural Selection is not the only source of evolutionary change and the laws of probability (genetics) don’t really work. ...
... Why? In small populations, Natural Selection is not the only source of evolutionary change and the laws of probability (genetics) don’t really work. ...
Topic 18 revision notes - Mr Cartlidge`s Saigon Science Blog
... Describe evolution as the change in adaptive features of a population over time as the result of natural selection Define the process of adaptation - the process, resulting from natural selection, by which populations become more suited to their environment over many generations Describe the develop ...
... Describe evolution as the change in adaptive features of a population over time as the result of natural selection Define the process of adaptation - the process, resulting from natural selection, by which populations become more suited to their environment over many generations Describe the develop ...
Speciation Species Allopatric speciation Sympatric speciation
... Isolating mechanism that acts after fertilisation to prevent the exchange of genes between populations, by impairing development or fertility of the offspring ...
... Isolating mechanism that acts after fertilisation to prevent the exchange of genes between populations, by impairing development or fertility of the offspring ...
Outline Part I
... 3. The allele frequencies in a population will remain the same from generation to generation unless acted upon by outside forces; this is known as the Hardy-Weinberg genetic equilibrium. It describes the “situation” under which evolution will not occur. This principle is based on a set of five assu ...
... 3. The allele frequencies in a population will remain the same from generation to generation unless acted upon by outside forces; this is known as the Hardy-Weinberg genetic equilibrium. It describes the “situation” under which evolution will not occur. This principle is based on a set of five assu ...
Genetic disorders
... Advantage of both: - Physicians can detect more than _________________________________ Disadvantage of Amniocentesis: most conditions are incurable and the results ____________________________________ (abortion at this time is very difficult) Disadvantage of CVS: __________________ _____________ ...
... Advantage of both: - Physicians can detect more than _________________________________ Disadvantage of Amniocentesis: most conditions are incurable and the results ____________________________________ (abortion at this time is very difficult) Disadvantage of CVS: __________________ _____________ ...
Conservation genetics premises
... Conservation biology premises, relevant to genetics (by the end of this course, you should be prepared to support or refute any of these) 1. Fitness is directly related to genetic variation 2. Genetic variation is critical for long-term survival of species 3. The goal of conservation biology is to p ...
... Conservation biology premises, relevant to genetics (by the end of this course, you should be prepared to support or refute any of these) 1. Fitness is directly related to genetic variation 2. Genetic variation is critical for long-term survival of species 3. The goal of conservation biology is to p ...
Practice Quiz - mvhs
... b) What domain is it in? ____________________ c) What kingdom is it in? ____________________ d) What is one other trait it would have, that others in its kingdom have? ___________________ c) According to Endosymbiont Hypothesis, which of the following is true? (circle one) a) Membrane infolding allo ...
... b) What domain is it in? ____________________ c) What kingdom is it in? ____________________ d) What is one other trait it would have, that others in its kingdom have? ___________________ c) According to Endosymbiont Hypothesis, which of the following is true? (circle one) a) Membrane infolding allo ...
Ch 16.Evolution of Populations.Biology.Landis
... This section describes the main sources of inheritable variation in a population. It also explains how phenotypes are expressed. ...
... This section describes the main sources of inheritable variation in a population. It also explains how phenotypes are expressed. ...
What is genetic engineering?
... characteristics of genes are changed. Genes can be added, replaced or taken away in order to help this change. ...
... characteristics of genes are changed. Genes can be added, replaced or taken away in order to help this change. ...
Genetic drift
Genetic drift (or allelic drift) is the change in the frequency of a gene variant (allele) in a population due to random sampling of organisms.The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces. A population's allele frequency is the fraction of the copies of one gene that share a particular form. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation.When there are few copies of an allele, the effect of genetic drift is larger, and when there are many copies the effect is smaller. In the early twentieth century vigorous debates occurred over the relative importance of natural selection versus neutral processes, including genetic drift. Ronald Fisher, who explained natural selection using Mendelian genetics, held the view that genetic drift plays at the most a minor role in evolution, and this remained the dominant view for several decades. In 1968, Motoo Kimura rekindled the debate with his neutral theory of molecular evolution, which claims that most instances where a genetic change spreads across a population (although not necessarily changes in phenotypes) are caused by genetic drift. There is currently a scientific debate about how much of evolution has been caused by natural selection, and how much by genetic drift.