Evolution of Populations - Sonoma Valley High School
... Are these plants different heights because of genetics or nutrition? ...
... Are these plants different heights because of genetics or nutrition? ...
Computer modeling of genetic drift
... number of COLONISTS or FOUNDERS, through: • 1. Dispersal (geographic) • 2. Bottleneck (population is drastically decreased in size -reestablishment of the population by a small number of founders. • Small populations lose genetic variability. • e.g., a gene locus has 25 alleles. Ten individuals foun ...
... number of COLONISTS or FOUNDERS, through: • 1. Dispersal (geographic) • 2. Bottleneck (population is drastically decreased in size -reestablishment of the population by a small number of founders. • Small populations lose genetic variability. • e.g., a gene locus has 25 alleles. Ten individuals foun ...
Vocabulary Review
... 2. When two related species live in the same area but mate during different seasons, they are separated by directional selection. ...
... 2. When two related species live in the same area but mate during different seasons, they are separated by directional selection. ...
Word Definition 1 non-Mendelian genetics rules
... genetic traits that are controlled by many genes 6 sex-linked gene a gene that is carried on the X or Y chromosome 7 carrier a person who has one dominant and one recessive allele for a trait 8 genetic disorder an abnormal condition that a person inherits through genes a genetic disorder that causes ...
... genetic traits that are controlled by many genes 6 sex-linked gene a gene that is carried on the X or Y chromosome 7 carrier a person who has one dominant and one recessive allele for a trait 8 genetic disorder an abnormal condition that a person inherits through genes a genetic disorder that causes ...
Factors Causing Evolution
... than that of the original population from where the first few individuals came. ...
... than that of the original population from where the first few individuals came. ...
Chapter 17
... ****The species that exist at any time are the net result of both speciation and extinction. -if you think of speciation as like a branch off of a family tree, then extinction is like the loss of one of those branches. ...
... ****The species that exist at any time are the net result of both speciation and extinction. -if you think of speciation as like a branch off of a family tree, then extinction is like the loss of one of those branches. ...
11.1 Genetic Variation Within Population
... • Allele frequencies measure genetic variation. – measures how common allele is in population – can be calculated for each allele in gene pool ...
... • Allele frequencies measure genetic variation. – measures how common allele is in population – can be calculated for each allele in gene pool ...
Genetics and Critical Illness
... - it is now believed that genetic predisposition influences the risk of serious infection and outcome. - thought to be related to single nucleotide polymorphisms (SNP) - influence severity of injury by controlling induction of TNF, NF kappa B and toll receptors - TT LNPEP rs XXX -> inherited mutatio ...
... - it is now believed that genetic predisposition influences the risk of serious infection and outcome. - thought to be related to single nucleotide polymorphisms (SNP) - influence severity of injury by controlling induction of TNF, NF kappa B and toll receptors - TT LNPEP rs XXX -> inherited mutatio ...
Evolution Review
... Name Date Period Evolution Review: Answer the following questions and make a flash card for each question. 1. In natural selection, those with _________ traits for the environment ___________ and get to ____________. 2. How keeps lethal recessive alleles in a population? __________________ 3. What i ...
... Name Date Period Evolution Review: Answer the following questions and make a flash card for each question. 1. In natural selection, those with _________ traits for the environment ___________ and get to ____________. 2. How keeps lethal recessive alleles in a population? __________________ 3. What i ...
Glossary (34,35)
... The unit of hereditary material (DNA) that causes a particular phenotype (generally assumed to be caused by a protein) ...
... The unit of hereditary material (DNA) that causes a particular phenotype (generally assumed to be caused by a protein) ...
Ch 23 Evolution of Populations
... • Mutations may be random or induced by the environment. The ONLY source of new genes and NEW alleles. • Deletions, duplications or rearrangements of many loci are usually harmful. • Point mutations may or may not change an amino acid/protein. • Duplications within ONE gene provide a large variation ...
... • Mutations may be random or induced by the environment. The ONLY source of new genes and NEW alleles. • Deletions, duplications or rearrangements of many loci are usually harmful. • Point mutations may or may not change an amino acid/protein. • Duplications within ONE gene provide a large variation ...
Slide 1
... Bad genes expressed in southern KNP, link to BTB, what the Y is going on?…. Females can also affect sex ratio… ...
... Bad genes expressed in southern KNP, link to BTB, what the Y is going on?…. Females can also affect sex ratio… ...
Chapter 11 Study Guide Vocabulary: Gene pool allele frequency
... 1. Why does genetic variation increase the chance that some individuals in a population will survive? 2. What are three sources of genetic variation in populations? 3. Describe a population that has a normal distribution of height. 4. Name three different forms of natural selection with respect to d ...
... 1. Why does genetic variation increase the chance that some individuals in a population will survive? 2. What are three sources of genetic variation in populations? 3. Describe a population that has a normal distribution of height. 4. Name three different forms of natural selection with respect to d ...
Chapter 9 Maintenance of Genetic Diversity
... Maintenance of Genetic Diversity Levels of genetic diversity result from the joint impacts of: Mutation & migration adding variation Chance & directional selection removing variation Balancing selection impeding its loss The balance between these factors depends strongly on population size and diffe ...
... Maintenance of Genetic Diversity Levels of genetic diversity result from the joint impacts of: Mutation & migration adding variation Chance & directional selection removing variation Balancing selection impeding its loss The balance between these factors depends strongly on population size and diffe ...
Evolution & Speciation
... • Random change in allele frequency causes an allele to become common ...
... • Random change in allele frequency causes an allele to become common ...
CFA 03- Review Notes
... Tennessee SPI Objective: Analyze data on levels of variation within a population to make predictions about survival under particular environmental conditions. Variation refers to a variety or diversity of traits (different kinds) within any given population. Three causes of variation 1) Diversity ...
... Tennessee SPI Objective: Analyze data on levels of variation within a population to make predictions about survival under particular environmental conditions. Variation refers to a variety or diversity of traits (different kinds) within any given population. Three causes of variation 1) Diversity ...
Allele Frequency, Gene Pools, and Species Variation
... Population X consists of a group of hares (rabbits) that are genetically similar. Population Y consists of a group of hares (rabbits) that are genetically varied. If they both live in the same habitat and something changes in their habitat, which population is more likely to survive? Explain. ...
... Population X consists of a group of hares (rabbits) that are genetically similar. Population Y consists of a group of hares (rabbits) that are genetically varied. If they both live in the same habitat and something changes in their habitat, which population is more likely to survive? Explain. ...
Founder effects in human populations
... only 2,600. After twelve to sixteen generations, with an eightyfold growth but only minimal gene dilution from intermarriage, Quebec has what geneticists call optimal linkage disequilibrium (genetic sharing).[15] The result: far fewer genetic variations, including those that have been wellstudied be ...
... only 2,600. After twelve to sixteen generations, with an eightyfold growth but only minimal gene dilution from intermarriage, Quebec has what geneticists call optimal linkage disequilibrium (genetic sharing).[15] The result: far fewer genetic variations, including those that have been wellstudied be ...
Genetic selection and variation
... Genes A gene can be described as a linear piece of DNA that includes a regulatory sequence that determines when the gene will be transcribed: An initiation sequence; Exons that are the coding region; Introns that are non coding regions and are spliced out of the gene during transcription; ...
... Genes A gene can be described as a linear piece of DNA that includes a regulatory sequence that determines when the gene will be transcribed: An initiation sequence; Exons that are the coding region; Introns that are non coding regions and are spliced out of the gene during transcription; ...
Introduction to BST775: Statistical Methods for Genetic Analysis I
... – On average 1 per chromosome (1 Morgan) ...
... – On average 1 per chromosome (1 Morgan) ...
Advances in Genetics
... • Inbred organisms have alleles very similar to their parents • This increases the chance of a genetic disorder showing in the ...
... • Inbred organisms have alleles very similar to their parents • This increases the chance of a genetic disorder showing in the ...
Intro To Evolutionary Process
... 1. Mutations- missense mutations are point level changes in the DNA. A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. 2. Crossing Over- causes changes in gene sequencing which can change phenotype. ...
... 1. Mutations- missense mutations are point level changes in the DNA. A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. 2. Crossing Over- causes changes in gene sequencing which can change phenotype. ...
Genetic Variation and Equilibrium
... movement of genes from one population to another as individuals move between populations – Increases the genetic variation of the receiving population ...
... movement of genes from one population to another as individuals move between populations – Increases the genetic variation of the receiving population ...
A1979HE73700001
... of the speciation process. "This paper reports for D. willistoni, the most widely distributed species of the group, our results concerning the first question. The interesting results are that all sorts of populations, separated in many cases by thousands of miles and living in different ecological s ...
... of the speciation process. "This paper reports for D. willistoni, the most widely distributed species of the group, our results concerning the first question. The interesting results are that all sorts of populations, separated in many cases by thousands of miles and living in different ecological s ...
Human genetic variation
Human genetic variation is the genetic differences both within and among populations. There may be multiple variants of any given gene in the human population (genes), leading to polymorphism. Many genes are not polymorphic, meaning that only a single allele is present in the population: the gene is then said to be fixed. On average, in terms of DNA sequence all humans are 99.9% similar to any other humans.No two humans are genetically identical. Even monozygotic twins, who develop from one zygote, have infrequent genetic differences due to mutations occurring during development and gene copy-number variation. Differences between individuals, even closely related individuals, are the key to techniques such as genetic fingerprinting. Alleles occur at different frequencies in different human populations, with populations that are more geographically and ancestrally remote tending to differ more.Causes of differences between individuals include the exchange of genes during meiosis and various mutational events. There are at least two reasons why genetic variation exists between populations. Natural selection may confer an adaptive advantage to individuals in a specific environment if an allele provides a competitive advantage. Alleles under selection are likely to occur only in those geographic regions where they confer an advantage. The second main cause of genetic variation is due to the high degree of neutrality of most mutations. Most mutations do not appear to have any selective effect one way or the other on the organism. The main cause is genetic drift, this is the effect of random changes in the gene pool. In humans, founder effect and past small population size (increasing the likelihood of genetic drift) may have had an important influence in neutral differences between populations. The theory that humans recently migrated out of Africa supports this.The study of human genetic variation has both evolutionary significance and medical applications. It can help scientists understand ancient human population migrations as well as how different human groups are biologically related to one another. For medicine, study of human genetic variation may be important because some disease-causing alleles occur more often in people from specific geographic regions. New findings show that each human has on average 60 new mutations compared to their parents.Apart from mutations, many genes that may have aided humans in ancient times plague humans today. For example, it is suspected that genes that allow humans to more efficiently process food are those that make people susceptible to obesity and diabetes today.