Which statement concerning the sickle-cell trait is true?
A. Individuals with the trait have the dominant phenotype but possess the recessive genotype.
B. Individuals with the trait have both a dominant and recessive allele for the disorder.
C. Individuals with the trait are genetically predisposed to the disorder but cannot display any symptoms.
D. Individuals with the trait tend to have the most severe form of the disease.
Answer: B
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A. language-deprived child B. receptive language learner C. English language learner D. bilingual child
The reliability of a difference score is
a. equal to the reliability of the most reliable of the two measures. b. equal to the reliability of the least reliable of the two measures. c. the average reliability of the two measures. d. expected to be lower than the reliability of either of the two measures.
When people's behavior and beliefs about their sexual orientation are in conflict, social scientists usually define them by their: a. Emotional attachments b. Sexual fantasies
c. Sexual behaviors. d. Sexual self-concept.
A researcher presents two lights of varying brightness to a subject who is asked to respond same or different by comparing their intensities. The researcher is seeking the __________ threshold
a. difference b. absolute c. subliminal d. phosphene