Any change in allele frequencies in a gene pool
is
a. natural selection.
b. macroevolution.
c. microevolution.
d. mutation.
e. artificial selection
C
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Which of the following statements regarding HSV-2 (genital herpes) is incorrect?
A. It can also infect oral mucosa. B. Virus is shed from active lesions only. C. It can be reactivated by bacterial infections. D. It can become latent in the sacral ganglion.
Assuming that a particular disorder is caused by an allele of a single gene, what feature of a pedigree would allow one to conclude that the disorder was caused by a dominant allele?
A. Two unaffected parents have an affected child. B. Two affected parents have an unaffected child. C. An affected mother only has affected sons. D. All of the descendants of a particular affected person are also affected
Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine. This arrangement _____
A) allows variable width of the double helix B) permits complementary base pairing C) determines the tertiary structure of a DNA molecule D) determines the type of protein produced
Where does transcription take place in human cells?
a. Nucleoid b. Nucleus c. Cytoplasm d. Nucleosome