Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 23, Problem 11TYK
In a random sample of a population of shorthorn cattle, 73 animals were red (CRCR); 63 were roan, a mixture of red and white (CRCr); and 13 were white (CrCr). Estimate the allele frequencies of CR and Cr, and explain whether or not the population is in Hardy-Weinberg equilibrium.
- a. CR = 0.64, Cr = 0.36; because the population is large and a random sample was chosen, the population is in equilibrium.
- b. CR = 0.7, Cr = 0.3; the genotype ratio is not what would be predicted from these frequencies, and the population is not in equilibrium.
- c. CR = 0.7, Cr = 0.3; the genotype ratio is close to what would be predicted from these frequencies, and the population is in equilibrium.
- d. CR = 1.04, Cr = 0.44; the allele frequencies add up to greater than 1, and the population is not in equilibrium.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A sample of 100 individuals from a population that is dimorphic at the A locus has genotype counts as follows.
AA: 30
Aa: 60
aa: 10
a) What are the allele frequencies in the population?
b) What are the expected genotype frequencies, if the population were at HardyWeinberg equilibrium?
c) Is the proportion of heterozygotes lower or higher than expected at Hardy-Weinberg equilibrium? What deviations from the assumptions of the model would best explain the observed difference?
A population consists of 300 individuals with the following genotypes:
AA – 100 Aa – 125 aa – 75
a. What are the values of p and q?
b. Is the population in Hardy-Weinberg equilibrium? Explain.
A hypothetical population of 10,000 humans has 6848 individuals with the blood type AA, 2846 individuals with blood type AB, and 306 individuals with the blood type BB.
What is the frequency of each genotype in this population?
What is the frequency of the A allele?
What is the frequency of the B allele?
If the next generation contained 25,000 individuals, how many individuals would have blood type BB, assuming the population is in Hardy-Weinberg equilibrium?
Chapter 23 Solutions
Biology - Study Guide
Ch. 23 - a. What is a major source of genetic variation for...Ch. 23 - In a population of 200 mice, 98 are homozygous...Ch. 23 - Use the allele frequencies you determined in...Ch. 23 - Practice using the Hardy-Weinberg equation so that...Ch. 23 - Prob. 5IQCh. 23 - Why hasnt the highly deleterious sickle-cell...Ch. 23 - a. What is Hardy-Weinberg equilibrium? b. Define...Ch. 23 - Prob. 2SYKCh. 23 - Prob. 1TYKCh. 23 - Prob. 2TYK
Ch. 23 - Prob. 3TYKCh. 23 - Prob. 4TYKCh. 23 - Mice have an estimated 1,000 olfactory receptor...Ch. 23 - Prob. 6TYKCh. 23 - If a population has the following genotype...Ch. 23 - In a population with two alleles, B and b, the...Ch. 23 - Prob. 9TYKCh. 23 - Prob. 10TYKCh. 23 - In a random sample of a population of shorthorn...Ch. 23 - Genetic drift is likely to be seen in a population...Ch. 23 - Porphyria variegata is a genetic disease...Ch. 23 - Cystic fibrosis is a very serious genetic disorder...Ch. 23 - Prob. 15TYKCh. 23 - Prob. 16TYKCh. 23 - Prob. 17TYKCh. 23 - Prob. 18TYKCh. 23 - Prob. 19TYKCh. 23 - Prob. 20TYKCh. 23 - Prob. 21TYK
Additional Science Textbook Solutions
Find more solutions based on key concepts
Some people consider Pasteur or Koch to be the Father of Microbiology, rather than Leeuwenhoek. Why might they ...
Microbiology with Diseases by Body System (5th Edition)
CAUTION How can evolutionary fitness be estimated? a. Document how long individuals survive. b. Count the numbe...
Biological Science (6th Edition)
2. A gene is a segment of DNA that has the information to produce a functional product. The functional product ...
Genetics: Analysis and Principles
Define histology.
Fundamentals of Anatomy & Physiology Plus Mastering A&P with eText - Access Card Package (10th Edition) (New A&P Titles by Ric Martini and Judi Nath)
Why do scientists think that all forms of life on earth have a common origin?
Genetics: From Genes to Genomes, 5th edition
Some people consider Pasteur or Koch to be the Father of Microbiology, rather than Leeuwenhoek. Why might they ...
Microbiology with Diseases by Body System (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How Can We Measure Allele Frequencies in Populations? What are four assumptions of the HardyWeinberg law?arrow_forwardHow Can We Measure Allele Frequencies in Populations? The MN blood group is a single-gene, two-allele system in which each allele is codominant. Why are such codominant alleles ideal for studies of allele frequencies in a population?arrow_forward10,000 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) If the next generation contains 25,000 individuals, how many would have blood type BB, assuming the population is in Hardy-Weinberg Equilibrium?arrow_forward
- In a particular species of flower, C1 codes for red flowers, C2 codes for white, with the heterozygous individuals being pink. A. In the frequency of pink individuals in the population was .7126, would you be able to estimate the frequencies of the individuals alleles in the population? Why or why not? B. If the frequency of red individuals in the population was .329, what would the estimated frequency of pink and white individuals be in the same population?arrow_forwardIf there are two alleles, A and a, in a population and the population is at Hardy–Weinberg equilibrium, what frequency of A would produce the greatest frequency of heterozygotes?arrow_forwardIf the frequency of allele b is 0.3 for a population in Hardy-Weinberg equilibrium, what percentage of that population would you expect to be BB, Bb, and bb?arrow_forward
- A hypothetical population of 10,000 humans has 6840 individuals with the blood type AA, 2860 individuals with blood type AB and 300 individuals with the blood type BB. If the next generation contained 25,000 individuals, how may individuals would have BB blood type, assuming the population is in Hardy-Weinberg equilibrium? Express as a whole number.arrow_forwardIn a population of 527 individuals, a locus has two alleles: T and t. If 148 individuals have the tt genotype, and the locus is at Hardy-Weinberg equilibrium, what is the frequency of the TT genotype? Round your answer to the second decimal place.arrow_forwardA population of 1000 beetles has 600 individuals that have genotype QQ, 100 individuals that have genotype Qq, and 300 individuals that have genotype qq. a) Calculate f(Q) and f(q) for this population. Show your work and don’t assume HWE. b) Calculate f(QQ), f(Qq), and f(qq) for this population. Show your work and don’t assume HWE. 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 Hardy-Weinberg equilibrium? Why or why not? (Although answering this question rigorously would require a statistical test, you don’t need to do that here.).arrow_forward
- If a population is in Hardy-Weinberg equilibrium for the multiple alleles A+, A and a, whose frequencies are p= 0.60 for A+, q= 0.20 for A, and r = 0.20 for a, what percentage of the population is expected to be heterozygous?arrow_forwardIn a certain population of frogs, 120 are green, 60 are brownish green, and 20 are brown. The allele for brown is denoted GB, and the allele for green is designated GG. These two alleles are incompletely dominant to each other. If this population were in Hardy-Weinberg equilibrium, how many green frogs would you expect to observe? (Remember to multiply the expected frequency by the number of frogs in the population.)arrow_forwardConsider the B locus which has two alleles in a population: B and b. Researchers examined the genotypes several individuals for this locus and obtained the following numbers B/B: 302individuals B/b: 56individuals b/b: 17individuals If the B locus is at Hardy-Weinberg equilibrium, what would the expected number of individuals with the Bb genotype? Round your answer to the closest full number.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Mendelian Genetics and Punnett Squares; Author: Professor Dave Explains;https://www.youtube.com/watch?v=3f_eisNPpnc;License: Standard YouTube License, CC-BY
The Evolution of Populations: Natural Selection, Genetic Drift, and Gene Flow; Author: Professor Dave Explains;https://www.youtube.com/watch?v=SRWXEMlI0_U;License: Standard YouTube License, CC-BY