What event will increase the frequency of a
mutation in a population over time?
a. fitness
b. natural selection
c. artificial selection
d. adaptive radiation
e. none of these
B
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You transform bacteria with a plasmid carrying the ampicillin-resistance gene ampR. How would you determine which bacteria took up the plasmid?
A. Bacteria containing the plasmid would be able to grow in the absence of ampicillin. B. Bacteria containing the plasmid would be able to produce ampicillin. C. Bacteria containing the plasmid would turn blue. D. Bacteria containing the plasmid would be able to grow in the presence of ampicillin. E. Ampicillin-resistance is necessary for the plasmid DNA to get into the bacteria.
Hemophilia A is an X-linked recessive disorder. If a normal man marries a woman who is a carrier, what fraction of their daughters will have hemophilia?
A. 75% B. 100% C. 25% D. 0% E. 50%
Southern blot is a method for ____
a. amplifying DNA segments using cycles of denaturation, annealing to primers, and DNA polymerase-directed DNA synthesis b. transferring DNA fragments from a gel to a membrane filter and used in hybridization experiments c. determining the nucleotide sequence of a DNA molecule d. producing several clones from a single cell by placing the cell in a Petri dish and allowing it to go through several divisions e. detecting mutant genes or differences in the pattern of gene expression
Which of the following products used by humans sometimes comes from plants?
A) fuel, only B) clothing, only C) food, only D) fuel, clothing, and food