Which of these statements is false concerning
covalent bonds?
a. Atoms share electrons.
b. Molecules may possess many covalent bonds.
c. Water contains polar covalent bonds.
d. Covalent bonds may be “double bonds.”
e. In polar covalent bonds, electrons are shared
equally.
Answer: e
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An initial, but extensive, study of a breeding population of gerbils shows that the allele for fluffy fur (F) is dominant and occurs with a frequency of 0.8, whereas the smooth fur allele (f) occurs with a frequency of 0.2. Several years later, another study is conducted which shows that the frequency of gerbils displaying the smooth fur phenotype is 0.4. Which statement is true?
a. The population exhibits Hardy-Weinberg equilibrium. b. The proportion of smooth-furred gerbils has doubled. c. Some kind of evolutionary force acted on the population. d. The allele for smooth fur has become dominant.
If you start with 3 double-stranded DNA fragments, after 4 cycles of PCR you will have ________ fragments.
A. 48 B. 24 C. 27 D. 12 E. 81
If two genes are almost always found in the same gamete,
a. they are located close together on the same chromosome. b. they are located on nonhomologous chromosomes. c. they are located far apart on the same chromosome. d. they are found on the sex chromosome. e. they are found on the autosome.
Gorillas and chimpanzees DO NOT
a. both knuckle walk. b. both have long arms. c. are quadrapedal walkers. d. lack tails. e. have foramen magnum at the center base of the skull.