Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 28.3, Problem 1COMQ
For many quantitative traits, genotypes and
a. the trait changes over time.
b. the trait is polygenic.
c. environmental variation affects the trait.
d. both b and c are true.
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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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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
- For many quantitative traits, genotypes and phenotypes tend tooverlap becausea. the trait changes over time.b. the trait is polygenic.c. environmental variation affects the trait.d. both b and c are true.arrow_forwardAll of the following are considered a quantitative trait, EXCEPT? a. A trait that has a continuously varying phenotype in the population. b. A trait that is influenced by both genetic and environmental factors. c. A trait that has multiple genes that contribute to the phenotype. d. A trait that is influenced by one gene that follows complete dominance inheritance patterns.arrow_forwardBiologists classify specific forms of traits as good or bad. For example, long tails in cats could be classified as good and short tails as bad. true or false?arrow_forward
- Which of the following does not describe a gene? A. A gene is the observable characteristics or traits B. All are correct C. Agene is a stretch of DNA that produces one or more genetic traits D. A gene is the basic unit of genetic information for a specific traitarrow_forwardWhich of the following statements about dominant traits is correct? a. The dominant trait is the one that is expressed. b. They are observed three-fourths as frequently as heterozygous traits. c. They are observed less frequently than recessive traits. d. They increase in frequency over evolutionary time. e. The dominant trait is typically masked by the recessive trait.arrow_forwardThe term polymorphism can refer to both genes and traits. Explain what is meant by a polymorphic gene and a polymorphic trait. If a gene is polymorphic, does the trait that the gene affects also have to be polymorphic? Explain why or why not.arrow_forward
- What is a quantitative trait locus (QTL)? a. A portion of the genome that is a particular quantitative length b. A portion of the genome in which polymorphic markers correlate with a phenotype c. A region of the genome where qualitative traits associate with discrete phenotypes d. A region of the genome that does not follow Mendelian inheritance patternsarrow_forwardIssues with inbreeding often occurs with dog breeds, such as German shepherds. How can we the best describe inbreeding? a. successive breeding with individuals from a variety of populations b. successive breeding within individuals from within one population c. breeding between different breeds to produce new breeds d. breeding the same set parents more than oncearrow_forwardHow can a polygenic trait be easily identified? a. There ae only two possible phenotypes for the trait. b. The graphing of the possible phenotypes results in a bell curve. c. The presence of the polygenic trait masks the other possible alleles involved. d. The environment has a greater influence on the trait.arrow_forward
- There is a population of cats and 16% of the cats this population show a recessive trait. a. What is the frequency of the recessive allele? b. What is the frequency of the dominant genotype? c. What is the frequency of cats with the heterozygous genotype?arrow_forwardHeritability: A. is the proportion of a trait in an individual that is explained by genes. B. decreases due to natural selection. C. is not influenced by the amount of environmental variance in a population. D. All of the abovearrow_forwardThe majority of traits are what? (gene number)arrow_forward
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