Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 23, Problem 3TY
Summary Introduction
Introduction: The Hardy-Weinberg equation represents frequencies of alleles and genotypes in a particular population. This equation can be represented as p + q = 1.
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A population of birds may have red feathers or orange feathers. Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype rr. The frequency of the RR genotype is .46 a. What is the frequency of heterozygous birds? B. What is the frequency of the R allele ? C. What is the frequency of r allele?
There is a population of cats and 16% of the cats this population show a recessive trait.
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1) 10,000 individuals are sampled from a population and are found to display one of three blood types: AA with 6800 individuals, AB with 2800 individuals and type BB with 400 individuals.
a) What is the frequency of each genotype in the population?
b) What is the frequency of the A allele?
c) What is the frequency of the B allele?
d) If the next generation contains 25,000 individuals, how many would have blood type BB, assuming the population is in Hardy-Weinberg Equilibrium?
Chapter 23 Solutions
Biology
Ch. 23.1 - Prob. 1CSCh. 23.2 - Prob. 1CCCh. 23.2 - Prob. 2CCCh. 23.2 - Prob. 3CCCh. 23.3 - Prob. 1CCCh. 23.3 - Prob. 1EQCh. 23.3 - Prob. 2EQCh. 23.3 - Prob. 3EQCh. 23.4 - Genetic Drift Concept Check: How does the...Ch. 23.4 - Prob. 1CS
Ch. 23.5 - Prob. 1CCCh. 23 - Population geneticists are interested in the...Ch. 23 - The Hardy-Weinberg equation characterizes the...Ch. 23 - Prob. 3TYCh. 23 - Prob. 4TYCh. 23 - Prob. 5TYCh. 23 - Prob. 6TYCh. 23 - Prob. 7TYCh. 23 - Prob. 8TYCh. 23 - Kimuras proposal regarding neutral variation...Ch. 23 - Populations that experience inbreeding may also...Ch. 23 - Prob. 1CQCh. 23 - Prob. 2CQCh. 23 - Prob. 3CQCh. 23 - Antibiotics are commonly used to combat bacterial...Ch. 23 - Discuss die similarities and differences among...
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- In a population of mountain lions, 9% of the individuals suffer from a disease caused by a recessive allele (aa). A) Calculate the frequency of both the dominant and recessive alleles. B) What is the percentage of homozygous dominant individuals and what is the percentage of heterozygous individuals in the population?arrow_forwardPopulation genetics is the study of ________. a. how allele frequencies in a population change over time b. populations of cells in an individual c. the rate of population growth d. how genes affect embryological developmentarrow_forwardIn population genetics, evolution describes how ____ change from onegeneration to the next.a. individuals c. phenotype frequenciesb. allele frequencies d. communitiesarrow_forward
- A mountain region has a population of 5,000 mountain goats. You score these animals for the R locus and find that this locus has two alleles, R (dominant) and r (recessive). 3200 individuals are homozygous dominant, 1,600 are heterozygous, and 200 are homozygous recessive. a) Calculate the allele frequencies for this population. Show your work. b) Calculate the observed genotypic frequencies for this population. Show your work. c) Calculate the expected genotype frequencies if the population is in Hardy-Weinberg equilibrium. Show your work. d) Does this population appear to be at H-W equilibrium? Why or why not? (You do not need to analyze this statistically).arrow_forwardMigration of individuals from a mainland population to a unique island population will result in… a. homogenization of allele frequencies between the two populations. b. isolation and bottleneck effect. c. increased homozygosity in both populations. d. increased population differentiation between the two populations.arrow_forwardbased on the image attached a) Explain how genetic drift caused egg hatching to decrease in the late 1980s and 1990. b) Why did hatching improve following translocations? c) What are the general effects of gene flow between populationsarrow_forward
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- 60 individuals have the genotype AA28 individuals have the genotype Aa12 individuals have the genotype aaWhat is the frequency of the A allele?Think of how many alleles in total?hint: add up the number of A alleles in this population: AA= 60+60 and Aa= 28.Add those together and divide by the total number of alleles.arrow_forwardIn horses, tobiano is a white spotting pattern. The tobiano allele (T) is dominant over the non-tobiano (t) allele. In an ideal horse population exhibiting Hardy–Weinberg equilibrium, 325 horses out of 500 are non-tobiano. a. Calculate the number of homozygous dominant tobiano horses. Answer b. Calculate the number of heterozygous horses. Answer c. Calculate the number of tobiano horses in the population. Answer Express your answer rounded to the nearest whole number.arrow_forwarda. What effect does combining genetic drift and natural selection have on beneficial mutations? b. How would you it change if population size increasesarrow_forward
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