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1. What could be the possible roles of genetic drift in human evolution? Discuss it and show possible evidences for each role.
Do not just copy it from somewhere, please.
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- 1. What could be the possible roles of genetic drift in human evolution? Discuss it thoroughly and present possible evidences for these roles. Do not just copy it from somewhere, please.29. Natural selection is the primary driving force of evolution, but there are other mechanisms at play as well. Define the following means and explain how they contribute to the process of evolution.1. How does genetic drift affect human evolution? Discuss it and present possible evidences. Do no just copy from somewhere, please.
- 1. Why do you think it is necessary for there to be variation in a population in order for evolution by natural selection to occur? 2. Why is it necessary for traits to be inherited for evolution to take place? 3. If a population is already well adapted to its environment, will most mutations be helpful or harmful? Explain.2. What is the role of variation in evolution – if heterozygosity is reduced, what happens to the potential for evolution? The phenotype (and genotype) of a population is due to a "mosaic" of random and directed processes. Some of these have to do with history; some are related to adaptation, etc. As completely as possible, discuss the role of chance and direction in evolution and in determining the phenotype of a population.1.Describe the ways that gene number or gene position on a chromosome, might be altered? What implications might that have on evolution? 2.What are the conditions that must be met for a population to stay in Hardy-Weinberg equilibrium? What happens if these conditions are not met? 3.What type of selection would most likely benefit heterozygous individuals and which will result in a population losing alleles: directional, disruptive, or stabilizing? Explain. 4.How might frequency dependent selection and the heterozygote advantage help maintain multiple alleles in a population? 5.Describe the theory of evolution by natural selection. Include terms like "excess reproduction, genetically distinct offspring, changing allele frequencies, and adaptive traits".
- 1. Fitness is, most correctly, a technical term. What does it mean? What two things do you suppose govern the rate of evolution by natural selection? Explain how Darwinian evolution can decrease and increase the frequency of an allele (or a more complex heritable trait, for that matter).1. In 200 words, explain the role of variation in evolution.1. Explain in 200 words how the Darwinian evolution can decrease or increase the frequency of an allele( or a more complex heritable trait, for that matter).
- 1. a) How does this experiment demonstrate the definition of evolution? b) Fitness of organisms is a function of the environment (that is, organisms best fit to the local environmental conditions leave more surviving offspring). How does this experiment demonstrate this fact?What are the two key facets of the Darwinian Theory of evolution? Explain them briefly.(If possible answer should be in accordance with NCERT Biology).1. Definitions of phenotype, genotype, allele, gene, microevolution, macroevolution 2. Know that in humans, most of the genetic variation is observed within populations, and know why that is. 3. Know the 4 processes of evolution (3 neutral + natural selection) 4. Know that evolution isn't progressive and doesn't necessarily lead to more complexity 5. Know that evolution can lead to traits that decrease survival (ex: sexual selection)