Explain why males are more likely than females to be affected by X-linked disorders.
What will be an ideal response?
Males are more likely to be affected by X-linked genetic disorders because they have only one X chromosome and therefore any genetic marks on their X chromosome are displayed. Females (XX) have two X chromosomes; a recessive gene located on one X chromosome will be masked by a dominant gene on the other X chromosome. Females are thereby less likely to display X-linked genetic disorders because both of their X-chromosomes must carry the recessive genetic disorder for it to be displayed.
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The term "ageism" refers to
a. changes as one grows older. b. prejudice against the elderly. c. the study of aging and the elderly. d. the incorporation of age norms in research.
By what age will a child demonstrate coordination of secondary schemes?
a. By 2-3 months b. By 4-5 months c. Not until 8-9 months d. Not until 12-18 months
When the probability and magnitude of harm or discomfort anticipated in the research are not greater than those encountered in daily life or during the performance of routine tests, we say that the risk is
A. minor risk. B. daily risk. C. static risk. D. minimal risk.
A variable-ratio schedule indicates that behavior is reinforced after an unchanging number of behaviors have occurred.
Answer the following statement true (T) or false (F)