Homeotic genes encode which type of protein?
a. transcription factors
b. ribosomal proteins
c. channel proteins
d. membrane-associated proteins
e. DNA methylases
ANSWER: a
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A karyotype is a(n) __________
A. organelle of eukaryotic cells. B. stage of prophase I in meiosis. C. division of the cytoplasmic material following mitosis. D. organized representation of the chromosomes within a cell. E. None of the answers are correct
If the Tn10 transposon is used to mutagenize a bacterium for the purpose of creating a mutation in the his operon, what would be the most appropriate selection media?
A) rich media that contains all of the amino acids supplemented with tetracycline B) minimal media supplemented only with histidine C) minimal media supplemented with tetracycline and histidine D) minimal media supplemented with tetracycline alone
Which of the following is a K-selected species?
a. anemone b. hamsters c. elephants d. sunflowers
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.