In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic
a. dominant
b. co-dominant
c. epistatic
d. pleiotropic
e. recessive
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In multicellular organisms, the mechanism most directly responsible for directing development and maintaining homeostasis is gene
A. mutation. B. duplication. C. deletion. D. regulation.
Some proteins overexpressed at high levels resulting in the formation of inclusion bodies can abolish the goal of producing large quantities of active protein. What could be done to minimize this issue?
A) Codon optimize the gene. B) Decrease the number of biobricks in the vector. C) Simultaneously produce intracellular chaperonins. D) Switch to an expression host with a larger intracellular volume.
A graduate student is studying the distribution of auxin in roots and stems exposed to sunlight
He notices that more auxin collects in the sides of stems and roots that are not exposed to light; however, the effects of this distribution are very different. Why? Select all correct choices. A. Auxin prevents cell elongation in the shaded cells of stems. B. Auxin (via ethylene) promotes cell elongation in the shaded cells of roots. C. Auxin (via ethylene) prevents cell elongation in the shaded cells of roots. D. Auxin promotes cell elongation in the shaded cells of stems.
Which is not a common method of sampling? a. Counting all individuals in the region
b. Mark-recapture sampling. c. Counting individuals in a representative area. d. Observing evidence of an organism's presence in an area.