Genetics: Analysis and Principles
5th Edition
ISBN: 9780073525341
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 27.1, Problem 1COMQ
Which of the following is an example of a quantitative trait?
a. Height
b. Rate of glucose
c. Ability to learn a maze
d. All of the above are quantitative traits.
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You perform an adoption study and you determine that for the trait observed there is a strong genetic effect.
This is because you observed _______.
A.
similarities between the adoptees and their sibblings
B.
similarities between adoptees and adoptive parents
C.
similarites between adoptees, biological parents, and adoptive parents
D.
similarities between adoptees and biological parents
Saying that a quantitative trait follows a continuum means thata. the numerical value for the trait increases with the age ofthe individual.b. environmental effects are additive.c. the phenotypes for the trait are continuous and do not fallinto discrete categories.d. the trait continuously changes during the life of an individual.
Which of the following is true about fitness?
a) It refers to the physical strength of an individual
b) It is determined solely by an individual's genotype
c) It is the same thing as survival
d) It is the ability of an individual to reproduce and pass on its genes to the next generation
Chapter 27 Solutions
Genetics: Analysis and Principles
Ch. 27.1 - 1. Which of the following is an example of a...Ch. 27.1 - 2. Saying that a quantitative trait follows a...Ch. 27.2 - The variance is a. a measure of the variation...Ch. 27.2 - 2. Which of the following statistics is used to...Ch. 27.3 - 1. For many quantitative traits, genotypes and...Ch. 27.3 - A QTL is a __________ where one or more genes...Ch. 27.3 - 2. To map QTLs, strains are crossed that differ...Ch. 27.4 - 1. In a population of squirrels in North Carolina,...Ch. 27.4 - Prob. 2COMQCh. 27.4 - 3. One way to estimate narrow-sense heritability...
Ch. 27.5 - 1. For selective breeding to be successful, the...Ch. 27.5 - Prob. 2COMQCh. 27 - Give several examples of quantitative traits.How...Ch. 27 - 2. At the molecular level, explain why...Ch. 27 - 3. What is a normal distribution? Discuss this...Ch. 27 - 4. Explain the difference between a continuous...Ch. 27 - What is a frequency distribution? Explain how such...Ch. 27 - 6. The variance for weight in a particular herd of...Ch. 27 - Two different varieties of potato plants produce...Ch. 27 - 8. If , would you conclude that a positive...Ch. 27 - Prob. 9CONQCh. 27 - When a correlation coefficient is statistically...Ch. 27 - 11. What is polygenic inheritance? Discuss the...Ch. 27 - What is a quantitative trait locus (QTL)? Does a...Ch. 27 - 13. Let’s suppose that weight in a species of...Ch. 27 - Prob. 14CONQCh. 27 - 15. From an agricultural point of view, discuss...Ch. 27 - Many beautiful varieties of roses have been...Ch. 27 - 17. In your own words, explain the meaning of the...Ch. 27 - 18. What is the difference between broad-sense...Ch. 27 - The heritability for egg weight in a group of...Ch. 27 - In a fairly large population of people living in a...Ch. 27 - When artificial selection is practiced over many...Ch. 27 - 22. Discuss whether a natural population of wolves...Ch. 27 - 23. With regard to heterosis, is each of...Ch. 27 - Here are data for height and weight among 10 male...Ch. 27 - 2. The abdomen length (in millimeters) was...Ch. 27 - 3. You conduct an RFLP analysis of head weight in...Ch. 27 - 5. Let’s suppose that two strains of pigs differ...Ch. 27 - Prob. 6EQCh. 27 - In a wild strain of tomato plants, the phenotypic...Ch. 27 - The average thorax length in aDrosophilapopulation...Ch. 27 - 9. In a strain of mice, the average 6-week body...Ch. 27 - Prob. 11EQCh. 27 - 11. A danger in computing heritability values from...Ch. 27 - For each of the following relationships,...Ch. 27 - An animal breeder had a herd of sheep with a mean...Ch. 27 - The trait of blood pressure in humans has a...Ch. 27 - Prob. 10EQCh. 27 - Discuss why heritability is an important...Ch. 27 - From a biological viewpoint, speculate as to why...Ch. 27 - 3. What is heterosis? Discuss whether it is caused...
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- Which of the following is an example of a quantitative trait?a. Heightb. Rate of glucose metabolismc. Ability to learn a mazed. All of the above are quantitative traits.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_forwardWhich of the following is the best definition of fitness? a. The ability to increase the number of alleles in a gene pool b. The ability to survive for a long time c. The ability of an individual to adapt to a changing environment d. The ability to produce many offspringarrow_forward
- What assumptions underlie the use of adoption studies in genetics? a. Adoptees have no contact with their biological parents after birth.b. The adoptive parents and biological parents are not related.c. The environments of biological and adoptive parents are independent.d. All of the above.arrow_forwardTrue or False: "Intelligence" is a good example of a quantitative 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_forward
- All 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_forwardA farmer only breeds cows that produce a lot of milk. This is because the farmer wants more cows that will produce more milk. In this case, who or what is the controlling agent that determines whether certain traits are passed to future generations? a the environment b the farmer c the milk d the cowsarrow_forwardIn a population of squirrels in North Carolina, the heritability forbody weight is high. This means thata. body weight is primarily controlled by genes.b. the environment has little influence on body weight.c. the variance in body weight is mostly due to genetic variation.d. both a and b are correct.arrow_forward
- In a Gwas study, why is it important to a.) Recruit thousands of people and b. Categorize participants according to traitarrow_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_forwardIs a person's weight a single genetic trait, a qualitative trait or quantitative trait?arrow_forward
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