Ch 13 Population Genetics
... - individuals (usually females) select mates not by chance - favors phenotypes that mates choose Ex. large showy tails in peacocks - leads to species specific traits, sexual dimorphism, reduces genetic variation ...
... - individuals (usually females) select mates not by chance - favors phenotypes that mates choose Ex. large showy tails in peacocks - leads to species specific traits, sexual dimorphism, reduces genetic variation ...
Natural selection
... • The net effect of drift is to reduce the amount of genetic variation segregating in a population ...
... • The net effect of drift is to reduce the amount of genetic variation segregating in a population ...
Mechanisms of Evolution
... the end of the 19th century. Their population has since rebounded to over 30,000 but their genes still carry the marks of this bottleneck. They have much less genetic variation than a population of southern elephant seals that was not so intensely hunted. ...
... the end of the 19th century. Their population has since rebounded to over 30,000 but their genes still carry the marks of this bottleneck. They have much less genetic variation than a population of southern elephant seals that was not so intensely hunted. ...
Microevolution File
... • Mutation: Creates new genetic variation needed for other forces of evolution to act. • Migration ...
... • Mutation: Creates new genetic variation needed for other forces of evolution to act. • Migration ...
Name Evolution: Natural Selection and Fitness Write the correct
... 5. Over the last 30 years, a part of the Hudson River known as Foundry Cove has been the site for many factories that have dumped toxic chemicals into the river. Some of these pollutants have accumulated in the mud at the bottom of the river. The polluted cove water contains many single-celled orga ...
... 5. Over the last 30 years, a part of the Hudson River known as Foundry Cove has been the site for many factories that have dumped toxic chemicals into the river. Some of these pollutants have accumulated in the mud at the bottom of the river. The polluted cove water contains many single-celled orga ...
File - fiserscience.com
... Men need only contribute sperm • Generally more available for mating than are women. ...
... Men need only contribute sperm • Generally more available for mating than are women. ...
1 - College of Computer, Mathematical, and Natural Sciences
... supported the hypothesis that drift had been acting in these populations by documenting that _____________ (4 pts). a. most populations were fixed for a single genotype, but genotypes varied among populations b. all populations were fixed for the same allele at each locus studied. c. average heteroz ...
... supported the hypothesis that drift had been acting in these populations by documenting that _____________ (4 pts). a. most populations were fixed for a single genotype, but genotypes varied among populations b. all populations were fixed for the same allele at each locus studied. c. average heteroz ...
Microevolution and the Genetics of Populations
... can occur due to the bottleneck effect, which may happen after a forest fire. can occur due to the founder effect, which may happen after a forest fire. is the non-random change in allele frequencies that occurs in a small population. ...
... can occur due to the bottleneck effect, which may happen after a forest fire. can occur due to the founder effect, which may happen after a forest fire. is the non-random change in allele frequencies that occurs in a small population. ...
The population memetics of DarwinTunes
... We are particularly interested in the effects of selection on our populations. However, a reproducing, mutating population of finite size will also evolve by chance – “drift.” The design of our experiment has two features to help us factor out the effect of drift. The first is replication. Each Darw ...
... We are particularly interested in the effects of selection on our populations. However, a reproducing, mutating population of finite size will also evolve by chance – “drift.” The design of our experiment has two features to help us factor out the effect of drift. The first is replication. Each Darw ...
05 Lecture Evolution 09
... Most are harmful; natural selection weeds out deleterious mutations 13.1 Neutral mutation likely beneficial (pre-adaptation) when environment changes Meiosis and fertilization recombine genes to yield more genetic variation. Sexual reproduction does not change genotype frequency in a population. For ...
... Most are harmful; natural selection weeds out deleterious mutations 13.1 Neutral mutation likely beneficial (pre-adaptation) when environment changes Meiosis and fertilization recombine genes to yield more genetic variation. Sexual reproduction does not change genotype frequency in a population. For ...
q 2 - University of Evansville Faculty Web sites
... • Difficult for selection to remove already rare allele (masked in heterozygotes) • When fitness of heterozygote is greater than fitnesses of homozygotes, then stable equilibrium is possible where p and q have significant frequencies – balanced polymorphism a result of overdominance ...
... • Difficult for selection to remove already rare allele (masked in heterozygotes) • When fitness of heterozygote is greater than fitnesses of homozygotes, then stable equilibrium is possible where p and q have significant frequencies – balanced polymorphism a result of overdominance ...
Allele Frequencyнаmeasure of how common a certain allele is in a
... cause a new allele to form. If in a reproductive cell it can be passed on. Increases genetic variation in a gene ...
... cause a new allele to form. If in a reproductive cell it can be passed on. Increases genetic variation in a gene ...
Butterfly evolution lab TA guide
... Butterfly evolution lab – TA guide Background: the students will have just learned about the events that led Darwin/Wallace to propose that organisms change over time (descent with modification), and that a particular mechanism, natural selection, could explain why organisms are so well suited to th ...
... Butterfly evolution lab – TA guide Background: the students will have just learned about the events that led Darwin/Wallace to propose that organisms change over time (descent with modification), and that a particular mechanism, natural selection, could explain why organisms are so well suited to th ...
Media Release
... sexes, and sex-specific selection, which is when natural selection favors different traits in different sexes, on a genome-wide scale in humans and flies. They observe a “Twin Peaks” pattern in both species where genes with intermediate differences in expression between the sexes are undergoing the ...
... sexes, and sex-specific selection, which is when natural selection favors different traits in different sexes, on a genome-wide scale in humans and flies. They observe a “Twin Peaks” pattern in both species where genes with intermediate differences in expression between the sexes are undergoing the ...
File
... Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
... Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
Ch - TeacherWeb
... 11. In a study of a population of field mice, you find that 48% of the mice have a coat color that indicates that they are heterozygous for a particular gene. What would be the frequency of the dominant allele in this population? a. 0.24 b. 0.48 c. 0.50 d. 0.60 e. You cannot estimate allele frequenc ...
... 11. In a study of a population of field mice, you find that 48% of the mice have a coat color that indicates that they are heterozygous for a particular gene. What would be the frequency of the dominant allele in this population? a. 0.24 b. 0.48 c. 0.50 d. 0.60 e. You cannot estimate allele frequenc ...
Continuous and discontinuous variation
... 3. Since p + q = 1, you can now calculate p (it is 1 − q). 4. Substitute the values you now have in the equation 1 = p2 + 2pq + q2 to give you the decimal fraction of each of the genotypes. 5. If the question asks you to calculate ‘how many individuals in then population are….’, then multiply the nu ...
... 3. Since p + q = 1, you can now calculate p (it is 1 − q). 4. Substitute the values you now have in the equation 1 = p2 + 2pq + q2 to give you the decimal fraction of each of the genotypes. 5. If the question asks you to calculate ‘how many individuals in then population are….’, then multiply the nu ...
Using Wooly Worms to Model Natural Selection Lab (Recovered)
... simulate the feeding by avian predators that have just arrived in the ecosystem. You will feed on (collect) as many worms in a timed session as you can by using chopsticks as model beaks. The collected worms are counted and recorded and a Chi-square test is used to determine if the yarn pieces were ...
... simulate the feeding by avian predators that have just arrived in the ecosystem. You will feed on (collect) as many worms in a timed session as you can by using chopsticks as model beaks. The collected worms are counted and recorded and a Chi-square test is used to determine if the yarn pieces were ...
08-30-11 st bio3 notes
... -viable: capable of reproducing (again) Objective: -live forever -can't -So: -DNA = code -1/2 of your DNA passed on to offspring Genetics Lesson: -Somatic cells -most in your body -all have 2 copies of each chromosome -chromosome: long, collection of genes -genes = you +your traits -Gametes -sperm a ...
... -viable: capable of reproducing (again) Objective: -live forever -can't -So: -DNA = code -1/2 of your DNA passed on to offspring Genetics Lesson: -Somatic cells -most in your body -all have 2 copies of each chromosome -chromosome: long, collection of genes -genes = you +your traits -Gametes -sperm a ...
Variation Within a Population
... geographic variation differences between gene Most species exhibit __________________, pools of separate populations or population subgroups ...
... geographic variation differences between gene Most species exhibit __________________, pools of separate populations or population subgroups ...
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.