Suppose that two bases are inserted into the coding region of a gene just after the start codon of a gene. What type of mutation has occurred?
a. a missense mutation
b. a chromosomal mutation
c. a silent mutation
d. a frameshift mutation
Ans: d. a frameshift mutation
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Genetic information carried by a(n) _____________________ directs the synthesis of a(n) _____________________
chain during translation. Fill in the blank(s) with the appropriate word(s).
What cell component is an important factor in the
pathogenicity of many disease-causing bacteria? a. nucleoid b. pilus c. polysaccharide capsule d. flagella e. cell wall
The fluid-mosaic model considers the cellular membranes to consist of ________ layer(s) of phospholipid molecules and that the individual phospholipids are able to move about within the structure of the membrane.
A. 1 B. 2 C. 3 D. 4
You have several hives of honey bees, Apis mellifera , that you keep in your backyard. Some bees uncap and remove dead larvae from cells, while others leave dead larvae in the cells; this difference is genetically determined. After a particularly hot summer in which many bees die from disease, you notice that the only hives remaining are the ones in which bees uncap and remove dead larvae. You have witnessed:
a) a population-level change in allele frequency. b) a population-level change in the frequency of a behavioral trait. c) evolution has not occurred, only bad weather. d) Only a) and c) are correct. e) a), b), and c) are all correct.