Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 5, Problem 26QP
Suppose that a team of researchers analyzes the heritability of high SAT scores and assigns a heritability of 0.75 for this ability. The team also determines that a certain ethnic group has a heritability value that is 0.12 lower compared with that of other ethnic groups. The group concludes that there must be a genetic explanation for the differences in scores. Why is this an invalid conclusion?
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A personality psychologist is interested if being a snob is heritable. To answer this question a personality psychologist recruits a huge sample of 2,593 identical twins and found that identical twins were similar in how snobby they were with an effect size of r=0.6. They also recruit a huge sample of 1845 fraternal twins and found that fraternal twins were also similar in how snobby they were with an effect size of r=0.4. Calculate the heritability coefficient for being a snob.
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Chapter 5 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 5.5 - Prob. 1GRCh. 5.5 - What are the possible advantages or disadvantages...Ch. 5 - After hearing this information, should Sue and Tim...Ch. 5 - Can cleft lip be surgically corrected? Sue and Tim...Ch. 5 - If the child showed a cleft lip through ultrasound...Ch. 5 - Describe why continuous variation is common in...Ch. 5 - The text outlines some of the problems Frederick...Ch. 5 - What role might environment have played in causing...Ch. 5 - Do you think Frederick Williams experiment would...Ch. 5 - As it turned out, one of the tallest Potsdam...
Ch. 5 - Describe why there is a fundamental difference...Ch. 5 - Sunflowers with flowers 10 cm in diameter are...Ch. 5 - Clubfoot is a common congenital birth defect. This...Ch. 5 - Define genetic variance.Ch. 5 - Define environmental variance.Ch. 5 - How is heritability related to genetic and...Ch. 5 - Why are relatives used in the calculation of...Ch. 5 - If there is no genetic variation within a...Ch. 5 - Can conjoined (Siamese) twins be dizygotic twins...Ch. 5 - Dizygotic twins: a. are as closely related as...Ch. 5 - Why are monozygotic twins who are reared apart so...Ch. 5 - Monozygotic (MZ) twins have a concordance value of...Ch. 5 - If monozygotic twins show complete concordance for...Ch. 5 - Researchers set up an obesity study in which MZ...Ch. 5 - What does the ob gene code for? How does it work?...Ch. 5 - What is the importance of the comparison of traits...Ch. 5 - Height in humans is controlled by the additive...Ch. 5 - If diseases such as cardiovascular disease...Ch. 5 - Prob. 24QPCh. 5 - Prob. 25QPCh. 5 - Suppose that a team of researchers analyzes the...
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- Suppose 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_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_forwardResearcher 1 studies IQ in the indigenous people of an isolated island with a population of approximately 3000 people. Researcher 2 studies IQ in North America, looking at millions of people who come from a broad range of social and economic backgrounds. Researcher 1 concludes that 70% of the variation in IQ is genetic, whereas Researcher 2 concludes than only 40% of the variation in IQ is genetic. What is the most likely explanation for these different estimates of the heritability of IQ? Group of answer choices The conclusions of Researcher 2 must be flawed, because environment always has a smaller effect on IQ than genetics Widespread use of technology in North America has increased abstract reasoning ability There is less environmental variation among the people being studied by Researcher 1, so there is less opportunity for the environment to cause differences among people IQ tests measure only a subset of the abilities that constitute the concept of intelligencearrow_forward
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