Discuss the difficulties in studying the genetics of human behavior traits
What will be an ideal response?
The search for genetic factors in alcoholism illustrates the problem of selecting the proper genetic model to analyze behavioral traits. Segregation and linkage studies indicate that there is no single gene responsible for most cases of alcoholism. If a multifactorial model involving a number of genes—each with a small additive effect—is invoked, the problem becomes more complicated. How do you prove or disprove that a specific gene contributes, say, 1% to the behavioral phenotype? At present, the only method to accomplish this would involve studying thousands of individuals to find such effects, and at present, few large-scale GWAS have been completed.
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Which type of disorder is most difficult to correct by gene therapy?
A) a dominant disorder B) an incompletely dominant disorder C) a recessive disorder D) Disorders showing all of these forms of dominance present equal challenges.
The physical basis of life is/are ____________
a. carbon b. water c. carbon and water d. carbon, water, and silicon
Which statement is true?
a. Once a vaccine for a virus has been developed, further vaccine development is unnecessary. b. Antiviral drug therapy is safer than vaccination because there is no risk of tissue damage involved. c. Viruses nearly eliminated by mass immunization campaigns can still cause epidemics. d. Vaccinations contain dangerous quantities of chemicals such as mercury and formaldehyde.
Four of the five answers listed below are true
about specific hormones and their effects. Select the EXCEPTION.
a. Thymosin helps T-cells mature. b. Calcitonin lowers blood level calcium. c. Pancreas secretes insulin and glucagons for blood sugar regulation. d. Cortisol affects the immune response. e. Pituitary gland secretes hormones that control the hypothalamus