Reproduction and Evolution Exam
... d. Variation dies with individuals. e. Genetic variation is easier seen than phenotypic variation. 21. New combinations of genes may be produced by a. crossing over. b. sexual reproduction. c. mutation. d. immigration. e. all of these 22. Which of the following is NOT a major process of microevoluti ...
... d. Variation dies with individuals. e. Genetic variation is easier seen than phenotypic variation. 21. New combinations of genes may be produced by a. crossing over. b. sexual reproduction. c. mutation. d. immigration. e. all of these 22. Which of the following is NOT a major process of microevoluti ...
Chapter 15 and 16 Study Guide Answers
... caused by recessive genes. 4. The bright coloration may increase a male’s chances of being selected for mating by a female. 5. Genetic homozygosity leaves no variation for natural selection to act on. Therefore, a new disease could wipe out the entire population. 6. directional selection; the cow wo ...
... caused by recessive genes. 4. The bright coloration may increase a male’s chances of being selected for mating by a female. 5. Genetic homozygosity leaves no variation for natural selection to act on. Therefore, a new disease could wipe out the entire population. 6. directional selection; the cow wo ...
3000_2013_2fg
... the effective population size accounts for changes in population size, gender ratio, better nest sites, other causes for some individuals contributing disproportionately to next generation ...
... the effective population size accounts for changes in population size, gender ratio, better nest sites, other causes for some individuals contributing disproportionately to next generation ...
Introduction to Genetics
... Probability • Probability: the likelihood that an event will occur • i.e.: coin flip = ½ or 50% • Determined by: • Probability = # times expected to occur ...
... Probability • Probability: the likelihood that an event will occur • i.e.: coin flip = ½ or 50% • Determined by: • Probability = # times expected to occur ...
Evolution Notes
... the other end. (EX: seed size and bird beak size) Stabilizing selection: when individuals near the center of the curve have higher fitness than individuals at wither end of the curve. (EX: weight of human infants at birth) Disruptive selection: when individuals at the upper and lower ends of the ...
... the other end. (EX: seed size and bird beak size) Stabilizing selection: when individuals near the center of the curve have higher fitness than individuals at wither end of the curve. (EX: weight of human infants at birth) Disruptive selection: when individuals at the upper and lower ends of the ...
Biology II Notes - Wando High School
... B. Five conditions are required for Hardy-Weinberg equilibrium: ...
... B. Five conditions are required for Hardy-Weinberg equilibrium: ...
90459 Genetic Variation answers-07
... (Gene flow adds new alleles when immigrants breed with individuals in the existing population.) AND Favourable alleles are selected for / gives advantage. (Become established in the gene pool due to the individual’s chance of survival and successful reproduction being increased.) (An allele that is ...
... (Gene flow adds new alleles when immigrants breed with individuals in the existing population.) AND Favourable alleles are selected for / gives advantage. (Become established in the gene pool due to the individual’s chance of survival and successful reproduction being increased.) (An allele that is ...
BioFlix Study Sheet for Mechanisms of Evolution
... A. the frequency of the green allele will increase. B. the frequency of the brown allele will increase. C. this causes the population to evolve due to gene flow. D. this causes the population to evolve due to genetic drift. E. the frequencies of the brown and green alleles will not change. ____3. In ...
... A. the frequency of the green allele will increase. B. the frequency of the brown allele will increase. C. this causes the population to evolve due to gene flow. D. this causes the population to evolve due to genetic drift. E. the frequencies of the brown and green alleles will not change. ____3. In ...
14-19 Learning Core Development Programme
... extractions can be lethal due to blood loss. Small knocks can cause internal bleeding and big bruises and joints may also bleed. ...
... extractions can be lethal due to blood loss. Small knocks can cause internal bleeding and big bruises and joints may also bleed. ...
BioFlix Study Sheet for Mechanisms of Evolution
... A. the frequency of the green allele will increase. B. the frequency of the brown allele will increase. C. this causes the population to evolve due to gene flow. D. this causes the population to evolve due to genetic drift. E. the frequencies of the brown and green alleles will not change. ____3. In ...
... A. the frequency of the green allele will increase. B. the frequency of the brown allele will increase. C. this causes the population to evolve due to gene flow. D. this causes the population to evolve due to genetic drift. E. the frequencies of the brown and green alleles will not change. ____3. In ...
15 and 16 vocab
... Immigration: movement of an individual or group into an area Emigration: movement of an individual or group out of an area Gene flow: the movement of genes into or out of a population due to interbreeding Gene pool: all genes of the reproductively active members of a population Allele frequency: the ...
... Immigration: movement of an individual or group into an area Emigration: movement of an individual or group out of an area Gene flow: the movement of genes into or out of a population due to interbreeding Gene pool: all genes of the reproductively active members of a population Allele frequency: the ...
Evolution_of_Populations2012
... Geographic isolation—separated by rivers,etc Temporal isolation—reproduce at different times ...
... Geographic isolation—separated by rivers,etc Temporal isolation—reproduce at different times ...
Conceptual Questions C1. Answer: A gene pool is all of the genes
... C18. Answer: Genetic drift is due to sampling error, and the degree of sampling error depends on the population size. In small populations, the relative proportion of sampling error is much larger. If genetic drift is moving an allele toward fixation, it will take longer in a large population becaus ...
... C18. Answer: Genetic drift is due to sampling error, and the degree of sampling error depends on the population size. In small populations, the relative proportion of sampling error is much larger. If genetic drift is moving an allele toward fixation, it will take longer in a large population becaus ...
Random Genetic Drift
... Average Genetic Variance AMONG populations INCREASES with RGD. This contributes to Speciation. ...
... Average Genetic Variance AMONG populations INCREASES with RGD. This contributes to Speciation. ...
Genetics and evolution
... Evolution = changes in a populations genes over time Helpful definitions Gene pool = a collection of all of the possible genes in a population Allelic frequency = the % of an allele in a gene pool Genetic equilibrium = occurs when allele frequency does not change (no evolution) (NO EVOLUTION!) If th ...
... Evolution = changes in a populations genes over time Helpful definitions Gene pool = a collection of all of the possible genes in a population Allelic frequency = the % of an allele in a gene pool Genetic equilibrium = occurs when allele frequency does not change (no evolution) (NO EVOLUTION!) If th ...
This lecture: parts of Ch 16/26: Population
... ***What forces can cause change in genotype frequency? 1) Natural selection --> differentiates subpopulations 2) Effects of small population size a) Genetic drift b) Founder effect c) Population bottlenecks 3) Assortative (non-random) mating 4) Gene flow (= dispersal/migration) --> homogenizes subp ...
... ***What forces can cause change in genotype frequency? 1) Natural selection --> differentiates subpopulations 2) Effects of small population size a) Genetic drift b) Founder effect c) Population bottlenecks 3) Assortative (non-random) mating 4) Gene flow (= dispersal/migration) --> homogenizes subp ...
Study Questions for Exam #1
... Understand the concept of linked genes and the results that indicate linkage between two genes. Apply the results of recombination frequency analysis to map the relative positions of genes on a chromosome. ...
... Understand the concept of linked genes and the results that indicate linkage between two genes. Apply the results of recombination frequency analysis to map the relative positions of genes on a chromosome. ...
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.