Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 28, Problem 12CONQ
What is a quantitative trait locus (QTL)? Does a QTL contain one gene or multiple genes? What technique is commonly used to identify QTLs?
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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...
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- According to Amar J. S. Klar, is there a such thing as “left handedness”? What is the preferred term? Describe how the genetics works, according to his hypothesis. What are the alleles, and which combinations of alleles make for which type of hand use?arrow_forwardQTL mapping and GWA (association) mapping are two different methods used to identify genes that affect complex traits. For each of the following statements, choosewhether it applies to QTL mapping, association mapping, or both.whether it applies to QTL mapping, association mapping, or both.arrow_forward40. A heterozygous monkey toe short individual with a short homozygous monkey toed individual. Draw your chart below. a. What are the two parents genotypes: b. What are their children's genotypes: C. What are their children's phenotypes: d. What is their phenotypic ratio: e. What percent of each phenotype are their children:arrow_forward
- What is a ”profile probability,” and what information is required in order to calculate it?arrow_forwardWhat is the difference between broad-sense heritability and narrow-sense heritability? Why is narrow-sense heritability such auseful concept in the field of agricultural genetics?arrow_forwardEstimates of narrow-sense heritability are useful for which of the following? O a) Determining the contribution of nonadditive alleles to phenotypic variance. O b) Determining what traits might be easy to selectively breed in a population. O c) Determining an individual organism's risk of inheriting a trait. O d) Determine the contribution of environment to a trait.arrow_forward
- What are some of the key differences and applications of genetictesting for prognostic versus diagnostic purposes?arrow_forwardIn population genetics, for a locus with two alleles, we use the variable q to indicate.. O Freq(A), the frequency of the dominant allele Freq(a), the frequency of the recessive allele Freq(AA), the frequency of the AA genotype O Freq(Aa), the frequency of the Aa genotype Freq(aa), the frequency of the aa genotypearrow_forwardA) For the 3-point test cross, draw a sample gene map. B) Give the map distances (include units). C) Calculate Interference (I) and COC. Show all work Fly trait body texture, antenna shape, eye color gaunt, normal, white gaunt, feathery, white gaunt, feathery, red shrunken, feathery, white shrunken, normal, white shrunken, feathery, red gaunt, normal, red shrunken, normal, red Total number of progeny: Gamete from trihybrid GNr Gnr GnR gnr gNr gnR GNR gNR Number 628 2708 113 3 124 661 2 2761 7000arrow_forward
- Explain how a Lod score is obtained and whatinformation it provides.arrow_forwardBriefly describe the polygenic threshold theory. How polygenic traits can be genetically determined? What are major factors affecting gene frequencies? How the Hardy-Weinberg relationship can be used in genetic counseling? Is it useful for genetic risk prediction?arrow_forwardWhich of the following best describes the broad-sense heritability of a trait? Variance in the trait that is due to genetic effects (VG) The proportion of phenotype variance that is due to genetic effects (VG/Vp) The proportion of phenotype variance that is due to genetic effects (Vp - VG) The proportion of phenotype variance that is not due to genetic effects (Vp- VE) the degree to which genes influencing a trait are passed from offspring to parents Toarrow_forward
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