Adaptation and Speciation
... (physical adaptations, or even changes in breeding to produce when food is most heavily available.). ...
... (physical adaptations, or even changes in breeding to produce when food is most heavily available.). ...
Divergent evolution: Same basic structure, different appearance
... · Allopatric: Physical barrier, isolation can be rapid, influenced by differences in environments · Sympatric: Same country, separated by intrinsic factors, populations evolve separately within range of parent species/same environment, behavioural differences Hardy-Weinberg Principle: · Phenotypic f ...
... · Allopatric: Physical barrier, isolation can be rapid, influenced by differences in environments · Sympatric: Same country, separated by intrinsic factors, populations evolve separately within range of parent species/same environment, behavioural differences Hardy-Weinberg Principle: · Phenotypic f ...
Lecture Ch 23 The evolution of populations
... A. Causes of microevolution 1. genetic drift- changes in the gene pool of a small population due to chance if you flip a coin 1000 times and 700=heads, 300=tails, suspicious if flip a coin 10 times and 7=heads, 3=tails, think chance a small number of samples (trials) allows chance to play a more imp ...
... A. Causes of microevolution 1. genetic drift- changes in the gene pool of a small population due to chance if you flip a coin 1000 times and 700=heads, 300=tails, suspicious if flip a coin 10 times and 7=heads, 3=tails, think chance a small number of samples (trials) allows chance to play a more imp ...
Population Genetics
... overrepresentation of some alleles. – Founder Effect: a few individuals leave the population to create a new population. ...
... overrepresentation of some alleles. – Founder Effect: a few individuals leave the population to create a new population. ...
Guided Notes2: Mechanisms of Evolution:
... 10.Directional selection favors one extreme version of a ___________________ or the other extreme version. 11.In ___________________ selection, both extreme versions of a phenotype are selected. 12._____________________ is the evolution of new species due to significant changes in the gene pool of a ...
... 10.Directional selection favors one extreme version of a ___________________ or the other extreme version. 11.In ___________________ selection, both extreme versions of a phenotype are selected. 12._____________________ is the evolution of new species due to significant changes in the gene pool of a ...
Agents of Evolutionary Change I. What is Evolution? I. What is
... 5. Mutation is the only way new variations can be produced. 6. Since mutation occurs so infrequently at any particular locus, it would rarely have an effect on allele frequencies. 7. Most mutations are "hidden" as recessive alleles. example: About 1 in in 12,000 babies carry the homozygous form of t ...
... 5. Mutation is the only way new variations can be produced. 6. Since mutation occurs so infrequently at any particular locus, it would rarely have an effect on allele frequencies. 7. Most mutations are "hidden" as recessive alleles. example: About 1 in in 12,000 babies carry the homozygous form of t ...
PHYSpopgenetics
... due to heritable variants among the population 2. Malaria is found in areas where the sickle-cell allele is found and it was discovered that heterozygous carriers of sickle-cell anemia are more resistant to malarial infection than the homozygous "normals". 3. Natural selection did not cause the sick ...
... due to heritable variants among the population 2. Malaria is found in areas where the sickle-cell allele is found and it was discovered that heterozygous carriers of sickle-cell anemia are more resistant to malarial infection than the homozygous "normals". 3. Natural selection did not cause the sick ...
Agents of Evolutionary Change
... due to heritable variants among the population 2. Malaria is found in areas where the sickle-cell allele is found and it was discovered that heterozygous carriers of sickle-cell anemia are more resistant to malarial infection than the homozygous "normals". 3. Natural selection did not cause the sick ...
... due to heritable variants among the population 2. Malaria is found in areas where the sickle-cell allele is found and it was discovered that heterozygous carriers of sickle-cell anemia are more resistant to malarial infection than the homozygous "normals". 3. Natural selection did not cause the sick ...
Chapter 16
... Using the equation p2 + 2pq + q2 = 1, T =p, t =q. q2 (tt) = 4/32, = .125 q = √.125 = .35 because, p + q = 1, p + .35 =1, p = 1-.35, p = .65 Fill in the equation p2(.65 x.65)+2pq(2[.65x.35])+q2(.35x.35)=1 p2(.42) +2pq (.46) + q2(.12) = 1 Hardy-Weinberg Genetic Equilibrium ...
... Using the equation p2 + 2pq + q2 = 1, T =p, t =q. q2 (tt) = 4/32, = .125 q = √.125 = .35 because, p + q = 1, p + .35 =1, p = 1-.35, p = .65 Fill in the equation p2(.65 x.65)+2pq(2[.65x.35])+q2(.35x.35)=1 p2(.42) +2pq (.46) + q2(.12) = 1 Hardy-Weinberg Genetic Equilibrium ...
Mechanisms of Evolution
... but rather natural selection acts on the range of phenotypes in a population. Evolution occurs as a populations genes and their frequencies change over time. Gene Pool- All the alleles of a populations genes. Allelic Frequency- the percentage of any specific allele in a gene pool. Genetic Equilibriu ...
... but rather natural selection acts on the range of phenotypes in a population. Evolution occurs as a populations genes and their frequencies change over time. Gene Pool- All the alleles of a populations genes. Allelic Frequency- the percentage of any specific allele in a gene pool. Genetic Equilibriu ...
chapter 8 - Palm Beach State College
... particular phenotype, as compared with the reproductive output of individuals with alternative phenotypes ...
... particular phenotype, as compared with the reproductive output of individuals with alternative phenotypes ...
Evolution of Populations Summary of Natural Selection
... survive are more likely to pass down the beneficial traits to their offspring Over LONG periods of time the beneficial traits become prevalent throughout the population All species alive today are descended with modifications from ancestral species thus uniting all living things in a tree of life ...
... survive are more likely to pass down the beneficial traits to their offspring Over LONG periods of time the beneficial traits become prevalent throughout the population All species alive today are descended with modifications from ancestral species thus uniting all living things in a tree of life ...
DISRUPTING GENETIC EQUILIBRIUM
... Gene Pool = the total genetic information stored in a population Adapting to new selection factors can only use existing genes found in the population Allele Frequency = the number of a certain allele in the population / the total number of all alleles The phenotype frequencies can change between ge ...
... Gene Pool = the total genetic information stored in a population Adapting to new selection factors can only use existing genes found in the population Allele Frequency = the number of a certain allele in the population / the total number of all alleles The phenotype frequencies can change between ge ...
Chapters 22-26
... Charles Darwin proposed that evolution by natural selection was the basis for the differences that he saw in similar organisms as he traveled and collected specimens in South America and on the Galapagos islands. A. Explain the theory of evolution by natural selection as presented by ...
... Charles Darwin proposed that evolution by natural selection was the basis for the differences that he saw in similar organisms as he traveled and collected specimens in South America and on the Galapagos islands. A. Explain the theory of evolution by natural selection as presented by ...
Genetic Equilibrium Honors Biology Mr. Lee Room 320
... (group of individuals of the same species that interbreed) Gene pool- consists of all the genes, and alleles, that are present in a population Relative frequency of an alleles is the number of times that an allele occurs in a gene pool ...
... (group of individuals of the same species that interbreed) Gene pool- consists of all the genes, and alleles, that are present in a population Relative frequency of an alleles is the number of times that an allele occurs in a gene pool ...
Lecture #10 Date ______
... Microevolution, IV • 2- Gene Flow: genetic exchange due to the migration of fertile individuals or gametes between populations (reduces differences between populations) ...
... Microevolution, IV • 2- Gene Flow: genetic exchange due to the migration of fertile individuals or gametes between populations (reduces differences between populations) ...
power point
... Who evolves Populations or individuals? Natural selection acts on the range of phenotypes ...
... Who evolves Populations or individuals? Natural selection acts on the range of phenotypes ...
reproductively separated
... • Individuals survive and reproduce • Advantageous allele passed on • Repeats over generations • Allele becomes more common in the gene pool= change in allele frequency ...
... • Individuals survive and reproduce • Advantageous allele passed on • Repeats over generations • Allele becomes more common in the gene pool= change in allele frequency ...
Mechansisms for Evolution 2015
... Gene pools are all of the alleles (alternate forms of genes) in all of the individuals that make up a population. For evolution to occur, genetic differences must at least partially account for phenotypic differences. ...
... Gene pools are all of the alleles (alternate forms of genes) in all of the individuals that make up a population. For evolution to occur, genetic differences must at least partially account for phenotypic differences. ...
Behavioral Objectives:
... Influence of genetic drift, gene flow, mutation, and natural selection on allele frequency in a gene pool. o Bottle neck effect & founder effect Genetic equilibrium – What is it? What conditions must be met for it to occur? (Hardy-Weinberg equilibrium) Evolution in polygenic v. single-gene traits o ...
... Influence of genetic drift, gene flow, mutation, and natural selection on allele frequency in a gene pool. o Bottle neck effect & founder effect Genetic equilibrium – What is it? What conditions must be met for it to occur? (Hardy-Weinberg equilibrium) Evolution in polygenic v. single-gene traits o ...
Population genetics
Population genetics is the study of the distribution and change in frequency of alleles within populations, and as such it sits firmly within the field of evolutionary biology. The main processes of evolution (natural selection, genetic drift, gene flow, mutation, and genetic recombination) form an integral part of the theory that underpins population genetics. Studies in this branch of biology examine such phenomena as adaptation, speciation, population subdivision, and population structure.Population genetics was a vital ingredient in the emergence of the modern evolutionary synthesis. Its primary founders were Sewall Wright, J. B. S. Haldane and Ronald Fisher, who also laid the foundations for the related discipline of quantitative genetics.Traditionally a highly mathematical discipline, modern population genetics encompasses theoretical, lab and field work. Computational approaches, often utilising coalescent theory, have played a central role since the 1980s.