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1 Psychology 100 Fall 2008 Madigan Behavior Genetics 01. Traits that are influenced by many gene pairs are called __________, and usually fit a _________. a. multigenic; normal distribution b. multigenic; abnormal distribution c. polygenic; abnormal distribution d. polygenic; normal distribution 02. In the diagram below, which of the arrows represents “niche seeking?” a. b. c. d. 03. The positive correlation between the IQ of adopted individuals and the IQ of their adoptive parents is ____________ in childhood and ___________ in adulthood. a. small; close to zero b. small; small c. large; small d. small; large 04. Heritability is: a. the phenotypic similarity between parents and offspring b. the phenotypic similarity between monozygotic twins c. the proportion of phenotypic variation due to variation in genes d. none of the above 05. The correlation of traits in MZ twins raised apart appears to be largest for ________ and smallest for ____________. a. physical and physiological characteristics; attitudes and values b. intelligence; personality c. personality; intelligence d. none of the above PSYCHOLOGY 100 PRACTICE TEST #3 FALL 2008
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2 Psychology 100 Fall 2008 Madigan 06. When Scott and Fuller bred basenjis and cocker spaniels together, they found that when their F 1 hybrids were mated together to produce the next generation, ________ showed fear and __________ did not, which is consistent with a single gene locus with the ‘fear’ allele being ____________. a. one-fourth, three-fourth, recessive b. half, half, recessive c. half, half, dominant d. three-fourth, one-fourth, dominant 07. Which of the following traits were found to have significant positive correlations in monozygotic (MZ) and dizygotic (DZ) twins? a. physical b. cognitive c. interest, preferences d. all of the above 08. Which of the following statements is most accurate about the influence of genes and the environment? a. the environment can modify genes b. the environment can’t influence traits/behaviors c. the environment can modify phenotype d. it appears that trait/behavior variation can be explained by 1 or 2 genes 09. The table shows the percentages of adopted (A) males with and without criminal records (C, N) as a function of their biological (BF) and adoptive fathers' (AF) criminal records. In these data there seems to be: AF-C A F- N BF - C 36 21 BF - N 11 10 a. an environmental influence and a genetic influence on criminal behavior b. a genetic influence only on criminal behavior c. an environmental influence only on criminal behavior d. a heritability of criminality that is close to zero 10. If there were no variance within a population, heritability in its members would be ____________, because ________________. a. 100 percent; the population is genetically identical
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