Which of the following is believed to be responsible for the high incidence of Huntington’s disease among Afrikaners who live in former Dutch colonies in South Africa?
a. bottleneck effect
b. founder effect
c. natural selection
d. genetic drift
b. founder effect
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A transposable element composed of an antibiotic resistance gene, a recombinase gene, and inverted repeats is identified in a bacterial genome. This element can be any of the following except
A. an integrated conjugative element. B. a composite transposon. C. an insertion sequence. D. a unit transposon.
Animals with a backbone are
A. vertebrates. B. chordates. C. colonial. D. invertebrates.
Mutation rates:
a. are generally unimportant in evolution. b. can be synonymous or non-synonymous. c. can be affected by environmental factors. d. are equal in all species—this is why we can accurately calibrate a molecular clock. e. tend to be higher in E. coli than in Homo sapiens.
Which group are vascular plants?
a) liverworts b) mosses c) hornworts d) ferns