In pedigree charts, autosomal dominant disorders typically Select one:
a. appear only in males.
b. appear in every generation.
c. appear only in females.
d. occur every third generation.
e. seem to disappear in one generation, only to reappear in the next generation.
b. appear in every generation.
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A sponge body type with many chambers lined with collar cells is called:
a. asconoid. b. syconoid. c. leuconoid. d. hexactinellida. e. demospongoid.
Reptiles and birds differ from amphibians in that they lack a free larval stage. What adaptation allowed the elimination of this stage?
What will be an ideal response?
Epidemiologists at the CDC in Atlanta, GA, have called you in to investigate an increased incidence of leukemia in a remote region of Africa. Shortly after you arrive, an RNA virus was isolated from patients and found to induce leukemia in mice
At this point, you don't know the viral gene product or the mechanism that causes development of leukemia. One of your lab assistants has isolated a variant of the virus that is missing 20% of the genome of the original virus and does not induce leukemia in mice. a) How would you determine which portion of the genome is associated with the development of leukemia? b) How would you determine the viral product or mechanism associated with the development of leukemia? What will be an ideal response?
The bile produced in the liver is delivered to the ________.
a) colon b) stomach c) small intestine d) liver