3. A population of beetles contains both light and dark beetles. The dark phenotype is dominant (DD or Dd), while the light phenotype is recessive (dd). To determine if the beetles were evolving, scientists studied the number of dark and light beetles present in the population in 2015 and in 2020. In 2015, the scientists found 337 light colored beetles and 663 dark colored beetles. In 2020, the scientists found 452 light colored beetles and 900 dark colored beetles. a. What is the frequency of light and dark phenotypes in 2015 and 2020? b. What is the frequency of alleles (D and d) in 2015 and 2020? Hint: The equation for Hardy-Weinberg equilibrium is 1-P² +2PQ+Q². The phenotype frequency of light colored beetles is equivalent to Q² and the frequency of recessive alleles is equal to the square root of Q². c. Is the beetle population evolving? How do you know?

3. A population of beetles contains both light and dark beetles. The dark phenotype is dominant (DD or Dd), while the light phenotype is recessive (dd). To determine if the beetles were evolving, scientists studied the number of dark and light beetles present in the population in 2015 and in 2020. In 2015, the scientists found 337 light colored beetles and 663 dark colored beetles. In 2020, the scientists found 452 light colored beetles and 900 dark colored beetles. a. What is the frequency of light and dark phenotypes in 2015 and 2020? b. What is the frequency of alleles (D and d) in 2015 and 2020? Hint: The equation for Hardy-Weinberg equilibrium is 1-P² +2PQ+Q². The phenotype frequency of light colored beetles is equivalent to Q² and the frequency of recessive alleles is equal to the square root of Q². c. Is the beetle population evolving? How do you know?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter21: Microevolution: Genetic Changes Within Populations

Section: Chapter Questions

Problem 8TYK: If the genotype frequencies in a population are 0.60 AA, 0.20 Aa, and 0.20 aa, and if the...

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6. Interpreting Data The figure below shows the frequency of foot phenotypes in a population of blue-footed boobies. What is the frequency of the w allele in this population? a) 0.2 b) 0.4 Phenotypes c) 0.5 Genotypes ww Ww ww d) 0.6 Number of animals (total = 500) 320 160 20 © 2018 Pearson Education, Inc. 7. Interpreting Data The figure below shows the frequency of foot phenotypes in a population of blue-footed boobies. What is the expected frequency of the WW genotype in this population assuming the population is in Hardy-Weinberg equilibrium? (Hint: The frequency of W is 0.5 and the frequency of w is 0.5.) a) 0.20 Phenotypes b) 0.25 c) 0.40 Genotypes ww Ww w d) 0.50 Number of animals (total = 500) 320 160 20 © 2018 Pearson Education, Inc. 8. Interpreting Data The figure below shows the frequency of foot phenotypes in a population of blue-footed boobies. Is this population in Hardy- Weinberg equilibrium? а) yes b) no Phenotypes Genotypes Ww ww Number of animals 320 160 20 (total =…
If the genotype frequencies in a population are 0.60 AA, 0.20 Aa, and 0.20 aa, and if the requirements of the HardyWeinberg principle apply, the genotype frequencies in the offspring generation will be: a. 0.60 AA, 0.20 Aa, 0.20 aa. b. 0.36 AA, 0.60 Aa, 0.04 aa. c. 0.49 AA, 0.42 Aa, 0.09 aa. d. 0.70 AA, 0.00 Aa, 0.30 aa. e. 0.64 AA, 0.32 Aa, 0.04 aa.
4) In a certain population, 49% of the individuals show the recessive phenotype. In nine generations, what will the frequency of the homozygous dominant genotype be assuming that the population is in the HWE? 49 ndividuals
3) Suppose I count all the genotypes in a population and I end up with: AA= 48, Aa = 52, aa = 65. What are the allele frequencies "A" and "a"? F(A) = 330 FLA) = 130152.FLA) 330 f(A) #ipart f(a) AA = 48 65 aa= I665 3301 Aa= 52 2. " is recessive The allele frequency of g is
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1. A population of snails that has striped and unstriped individuals has recently moved into a new region. Birds break the snails open by dropping them onto the rocks. The birds eat the bodies of the snails and leave the shells. In one area, researchers counted both live snails and broken shells. The data are summarized below. Number of Snail Shells Striped Shells Unstriped Shells Snails living snails broken (dead) 264 296 486 277 snails a) Analyze the data. Which form of snail (striped or unstriped) is more likely to be caught by the birds for food? Explain how you know. b) Suggest a hypothesis to explain what is happening to the snails. c) Predict and explain how the frequencies of striped and unstriped individuals in the population might change over many generations.
20. A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 25% of the animals display a recessive trait (aa), the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants. What proportion of the population is probably heterozygous (Aa) for this trait? (LS3-3) * 0.05 0.25 0.50 O 0.75
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1. The frequency of PKU in the human population is 1 X 104.What is the expected frequency among the offspring of first cousins (F=1/16)? A D B.
6. A particular genetic disorder is associated with a single gene with two alleles. Individuals with two recessive alleles are affected. The prevalence of the disorder is 1 in 6,600. Assuming the population is in Hardy-Weinberg equilibrium, which of the following is closest to the frequency of carriers in the general population? 0/1 Show Your Work 0.01230 0.00015 0.98770 0.02430
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24. In a toad population, green toads produce 4 offspring over their lifetime, brown toads produce 2.5 offspring, and gray toads produce 6 offspring. What are the relative fitnesses of these phenotypes (in the order green, brown, gray)? Group of answer choices 1, 0.42, 0.67 0.33, 1, 0.67 0.67, 0.42, 1 0.67, 0.33, 1 1, 0.33, 0.67