Twenty-five years ago, when Oshima and colleagues discovered that a mutation in the GAL4 gene led to the inability to synthesize all five enzymes required for galactose catabolism (breakdown), they couldn't be blamed for wanting to apply a bacterial model
to explain this finding. What they expected, but did not find, was _____.
A) that all five genes constitute an operon
B) five widely separated genes, each containing a GAL4-binding site in its regulatory region
C) that chromatin decondensation played an important role in regulating the genes of galactose catabolism
D) that transcription is important in regulating the genes of galactose catabolism
Answer: A
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Although there are as many starlings in North America as there are in Europe, genetic variability in the
North American population is reduced relative to that in Europe because a. there are more environments in Europe. b. the North American population is derived from a small founder population. c. there is more gene flow in Europe. d. there is less mutation in North America. e. mutation is operating.
Which of the following terms is not closely related to the others?
A. Haplotype B. Single nucleotide polymorphism C. Genome-wide association study D. Induced pluripotency E. All of these terms are closely related
Explain why mice are appropriate animal models for human behavioral genetics researc What will be an ideal response?
Water has the ability to dissolve salts and carry dissolved carbon dioxide. How does this action help the human body maintain homeostasis?
A) production of energy for cells B) distribution of needed materials to the cells C) removal of waste from the cells and the body D) absorption of needed materials from the environment