Which of the following conditions must be present to conduct a genome-wide linkage analysis?
a. small families with one or two occurrences of the same disorder as well as a small sample of "affected relative pairs"
b. a small sample of "affected relative pairs"
c. large groups of unrelated individuals with similar family backgrounds
d. either large families with many individuals suffering from the same disorder or large samples of "affected relative pairs"
Answer: d. either large families with many individuals suffering from the same disorder or large samples of "affected relative pairs"
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What is the general conclusion of researchers who have investigated the influence of genetic factors on attention-deficit/hyperactivity disorder?
a. Genetic factors strongly contribute to this disorder. b. The concordance rate for MZ twins is high, but symptoms appear to be reactions to other mental disorders. c. Genetic factors seem to play no role in the development of this disorder. d. The concordance rate among dizygotic twins is higher than it is for monozygotic twins.
In the research of Wiseman, et al., which is the main study reported in the article Psychics and Scientists, the findings
for accurate recognition of printeddescriptorsabout crimes were that (a) both psychics and non-psychics werevery accurate (b) neither psychics or non-psychics were very accurate (c) psychics were significantly more accuratethan non-psychics (d) non-psychics were significantly more accurate than psychics