6. X-linked traits and diseases occur in men when a) part of the X chromosome is
ID: 3447129 • Letter: 6
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6. X-linked traits and diseases occur in men when a) part of the X chromosome is defective or missing b) the X chromosome carries more dominant than recessive genes. c) a recessive gene on the X is not blocked by a corresponding allele on the d) an individual has an extra X chromosome 7. Alex has Klinefelter syndrome, genetically caused by which is why he has small testicles, a number of learning problems, and shyness in social situations. a) a missing X chromosome in the sex chromosomes of males b) an extra X chromosome in the sex chromosomes of females (XXX) c) an extra X chromosome in the sex chromosomes of males (XxY) d) an extra X chromosome in the 21st position 8. Heritability estimates are highest for a)general intelligence b)alcoholism c)sexual orientation d) autism spectrum disorders and schizophrenia 9. The heritability estimates for personality characteristics such as extraversion, neuroticism, emotionality, activity level, and sociability a) are stable across the entire age range that has been studied b) decline after late adolescence c) decline after middle adulthood d) increase after children leave middle childhood 10. If identical twins are no more similar on a given trait than are fraternal twins, we can assume that a) the trait has a high heritability index b) the trait isn't influenced by nonshared environment c) the trait has a low heritability index d) the trait isn't influenced by shared environment 11·One of the threats to the validity of twins studies of heritability is the assumption that a) nonidentical twins have environments that are more similar than the environments of identical twins. b) the environment of identical twins is similar to the environment of nonidentical twins. c) parents recognize the greater similarity in identical twins d) nonidentical twins are only as genetically similar as any set of brothers and sisters. 12. The heritability estimate for attitudes on racial integrationExplanation / Answer
6. Option a. X-linked traits and disorder occur in men when a part of the X chromosome is missing or defective.
7.option c. Klinefelter syndrome is cause by an extra X chromosome in The sex chromosomes of males.
8. Option a. Heritability estimates are highest for general intelligence
9.a) the heritability estimates for personality traits are found to be stable across the entire age range that has been studied.
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