In the construction of a YAC library, each chromosome has the advantage of being able to hold very long DNA sequences. However, besides selectable marker(s) the YAC vector must minimally include which of the following?
A) a bacterial origin (ori)
B) cos site(s) and origin
C) centromere, telomeres, and yeast origin
D) centromere and origin
E) centromere and telomeres
C
You might also like to view...
In your Drosophila laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.
A. pair-rule B. gap C. maternal effect D. segment-polarity E. gap or segment-polarity
Most ocean currents flow clockwise in the Northern Hemisphere
Indicate whether the statement is true or false.
When comparing the pyramids of biomass between Silver Springs, Florida, and the English Channel,
a. the pyramids for Silver Springs and the English Channel are both bottom heavy. b. the pyramids for Silver Springs and the English Channel are both top heavy. c. the pyramid for Silver Springs is bottom heavy and the English Channel pyramid is top heavy. d. the pyramid for Silver Springs is top heavy and the English Channel pyramid is bottom heavy. e. researchers are unable to create pyramids for Silver Springs and the English Channel.
Which of the following is NOT true about sponges?
a. They have few predators or pathogens. b. Some groups have sharp spicules of silica or calcium carbonate. c. Some species secrete a slimy body coating. d. They can harvest sea anemone nematocysts and use them for their own defense. e. Disease and overharvesting have caused population declines.