Evolutionary Analysis (5th Edition)
Evolutionary Analysis (5th Edition)
5th Edition
ISBN: 9780321616678
Author: Jon C. Herron, Scott Freeman
Publisher: PEARSON
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Chapter 3, Problem 2Q
  1. a. Describe Darwin’s four postulates in your own words. What would have happened in the snapdragon experiment if any of the four had not been true?
  2. b. If Darwin’s four postulates are true for a given population, is there any way that evolution cannot happen? What does this imply about whether evolution is or is not occurring in most populations today?
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Apply the VIDA table to the evolution of sickle cell disease to justify whether it is an instance of evolution by natural selection. Answer the following questions. Is there variation in this trait in the population? How exactly does it vary? Is the trait at least partly inherited? Is there selection for this trait in a particular environment? (What is the selective pressure? And how does a trait give an advantage or disadvantage in that environment?) What is the evidence that this trait makes organisms better adapted to their environment?
Evolution is a change in frequencies of alleles in the gene pool of a population. This definition of evolution was developed a result of the work in the 20th century by Hardy and Weinberg. Through mathematical modeling based on probability, they concluded that allele and genotype frequencies in a population will remain constant from generation to generation absence of evolutionary influences. Evolution will not occur in a population if seven conditions are met: 1. mutation is not occurring 2. natural selection is not occurring 3. the population is infinitely large 4. all members of the population breed 5. mating is totally random 6. everyone produces the same number of offspring 7. there is migration in or out of the population One of the criteria in the prompt above has been mis-typed. Correct the erroneous phrase so evolution will NOT occur.A) (5) There is sexual selection.B) (1) Mutation occurs within the population.C) (4) The fittest members of the population breed.D) (7)…
Which of the following factors are required in order for evolution to occur?   a. Individuals within a population must be receptive to change and collectively determine which trait(s) is/are to be modified in subsequent generations   b. Genetic variation within a population must exist or have the potential to arise, and shifts in allelic frequencies will take place or have the potential to take place   c. Individuals within a population should be able to reproduce effectively (i.e., without barriers to reproduction existing)   d. Both A & B   e. Both B & C
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Mechanisms of Genetic Change or Evolution; Author: Scientist Cindy;https://www.youtube.com/watch?v=5FE8WvGzS4Q;License: Standard Youtube License