Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 28, Problem 9EQ
In a strain of mice, the average 6-week body weight is 25 g, and the narrow-sense heritability for this trait is 0.21.
A. What would be the average weight of the offspring if parents with a mean weight of 27 g were chosen?
B. What parental mean weight would you have to choose to obtain offspring with an average weight of 26.5 g?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A characteristic has a narrow-sense heritability of 0.6. a. If the dominance variance (VD) increases and all other variance components remain the same, what will happen to narrow-sense heritability? Will it increase, decrease, or remain the same? Explain. b. What will happen to broad-sense heritability? Explain. c. If the environmental variance (VE) increases and all other variance components remain the same, what will happen to narrow-sense heritability? Explain.
In a wild strain of tomato plants, the phenotypic variance fortomato weight is 3.2 g2. In another strain of highly inbred tomatoesraised under the same environmental conditions, the phenotypicvariance is 2.2 g2. With regard to the wild strain,A. Estimate VG.B. What is hB2?C. Assuming that all of the genetic variance is additive, what is hN2?
The narrow-sense heritability of wing length in a population of Drosophila melanogaster is 0.8. The narrow-sense heritability of head width in the same population is 0.9. The genetic correlation between wing length and head width is −0.86. If a geneticist selects for increased wing length in these flies, what will happen to head width?
Chapter 28 Solutions
Genetics: Analysis and Principles
Ch. 28.1 - 1. Which of the following is an example of a...Ch. 28.1 - 2. Saying that a quantitative trait follows a...Ch. 28.2 - The variance is a. a measure of the variation...Ch. 28.2 - 2. Which of the following statistics is used to...Ch. 28.3 - 1. For many quantitative traits, genotypes and...Ch. 28.4 - A QTL is a __________ where one or more genes...Ch. 28.4 - 2. To map QTLs, strains are crossed that differ...Ch. 28.5 - 1. In a population of squirrels in North Carolina,...Ch. 28.5 - Prob. 2COMQCh. 28.5 - 3. One way to estimate narrow-sense heritability...
Ch. 28.6 - 1. For selective breeding to be successful, the...Ch. 28.6 - Prob. 2COMQCh. 28 - Give several examples of quantitative traits.How...Ch. 28 - 2. At the molecular level, explain why...Ch. 28 - 3. What is a normal distribution? Discuss this...Ch. 28 - 4. Explain the difference between a continuous...Ch. 28 - What is a frequency distribution? Explain how such...Ch. 28 - 6. The variance for weight in a particular herd of...Ch. 28 - Two different varieties of potato plants produce...Ch. 28 - 8. If , would you conclude that a positive...Ch. 28 - Prob. 9CONQCh. 28 - When a correlation coefficient is statistically...Ch. 28 - 11. What is polygenic inheritance? Discuss the...Ch. 28 - What is a quantitative trait locus (QTL)? Does a...Ch. 28 - 13. Let’s suppose that weight in a species of...Ch. 28 - Prob. 14CONQCh. 28 - 15. From an agricultural point of view, discuss...Ch. 28 - Many beautiful varieties of roses have been...Ch. 28 - 17. In your own words, explain the meaning of the...Ch. 28 - 18. What is the difference between broad-sense...Ch. 28 - The heritability for egg weight in a group of...Ch. 28 - In a fairly large population of people living in a...Ch. 28 - When artificial selection is practiced over many...Ch. 28 - 22. Discuss whether a natural population of wolves...Ch. 28 - 23. With regard to heterosis, is each of...Ch. 28 - Here are data for height and weight among 10 male...Ch. 28 - 2. The abdomen length (in millimeters) was...Ch. 28 - 3. You conduct an RFLP analysis of head weight in...Ch. 28 - 5. Let’s suppose that two strains of pigs differ...Ch. 28 - Prob. 6EQCh. 28 - In a wild strain of tomato plants, the phenotypic...Ch. 28 - The average thorax length in aDrosophilapopulation...Ch. 28 - 9. In a strain of mice, the average 6-week body...Ch. 28 - Prob. 10EQCh. 28 - 11. A danger in computing heritability values from...Ch. 28 - For each of the following relationships,...Ch. 28 - An animal breeder had a herd of sheep with a mean...Ch. 28 - The trait of blood pressure in humans has a...Ch. 28 - Discuss why heritability is an important...Ch. 28 - From a biological viewpoint, speculate as to why...Ch. 28 - 3. What is heterosis? Discuss whether it is caused...
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
- Two loci contribute to eyelash length in angora rabbits (locus A and B). Assuming additive genetic variance and disregarding environmental effects, you determine that the following alleles contribute the following values to the total expression of lash length (in cm) A = 2.3, a=1.5, B=2.4, b=1.7 What would the phenotype of a rabbit with a genotype of AABb be? _________cmarrow_forwardIn a cross between two inbred lines of Drosophila, the F1 progeny has the phenotypic variance of 0.87 for the number of abdominal bristles. The F2 generation has the phenotypic variance of 3. a)What is the environmental variance? __________ b)What is the genetic variance of the F2? __________ In a plant, height varies between 6 and 36 cm and is governs by 3 genes with wild-type alleles being additive. What would be the genotype of a plant16 cm in height? there might be multiple possible answers Name one mutation which is a suppressor of bri1-5arrow_forwardThe mean and variance of Corolla length in two highly strains of tabacco and their progeny are shown in the following table one parent (P1) has a short corolla and the other parent ( P2) have a long corolla calculate the broad sense heritability (H) of Corolla length in the plant Strain. Mean(mm). Variance (mm) P1 short 40.47. 3.12 P2 long. 93.75. 3.87 F1(P1×P2). 63.90. 4.74 F2(F1×F2). 68.72. 47.70arrow_forward
- A hypothetical study investigated the vitamin A content and thecholesterol content of eggs from a large population of chickens.The variances (V) were calculated, as shown at the top of the nextcolumn: Variance Vitamin A CholesterolVP 123.5 862.0VE 96.2 484.6VA 12.0 192.1VD 15.3 185.3 Calculate the narrow-sense heritability (h2) for bothtraits.arrow_forwardThe mean and variance of plant height of two highly inbred strains (P1 and P2) and their progeny (F1 and F2) are shown here. Strain Mean (cm) Variance P1 34.2 4.2 P2 55.3 3.8 F1 44.2 5.6 F2 46.3 10.3 Calculate the broad-sense heritability (H2) of plant height in this species.arrow_forwardThe narrow-sense heritability of ear length in Reno rabbits is 0.4. Thephenotypic variance (VP) is 0.8, and the environmental variance (VE) is0.2. What is the additive genetic variance (VA) for ear length in theserabbits?arrow_forward
- How are the standard deviation and variance related to each other? How are they different than just measuring the range? Can plot samples of dandelion cover from two different locations have the same mean but different variance? Explain. Can you answer question 3? Thanks.arrow_forwardSuppose that in a population of Peacocks the phenotypic variance for tail length is 2.5 and the heritability for this trait is 0.4. From a long-term captive population you also have data from a line of completely inbred individuals. In this line the phenotypic variance among individuals is 0.50. Assume that there is no epistatic variance (VI) for this trait. Calculate the following: What is the additive genetic variance? What is the dominance genetic variance? What is the environmental variance? What is the broad-sense heritability (H2)?arrow_forwardSuppose that in a population of Peacocks the phenotypic variance for tail length is 2.5 and the heritability for this trait is 0.4. From a long-term captive population you also have data from a line of completely inbred individuals. In this line the phenotypic variance among individuals is 0.50. Assume that there is no epistatic variance (VI) for this trait. Calculate the following: What is the total genetic variance for tail length? What is the additive genetic variance? What is the dominance genetic variance? What is the environmental variance? What is the broad-sense heritability (H2)?arrow_forward
- Calculate the Variance of the following data set: 10, 15, 13, 12, 14arrow_forwardTail length in a population of peacocks has a phenotypic variance of 2.56cm^2 and an enviromental variance of 1.14cm^2. What is the broad sense heritability (H2)?arrow_forwardPhenotypic variation in the tail length of mice has the following components: Additive genetic variance (VA) Dominance genetic variance (VD) Gene interaction variance (VI) Environmental variance (VE) Genetic–environmental interaction variance (VGE) a. What is the narrow-sense heritability of tail length? b. What is the broad-sense heritability of tail length?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Genetic Variation and Mutation | 9-1 GCSE Science Biology | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=bLP8udGGfHU;License: Standard YouTube License, CC-BY