Homeotic genes of Drosophila:a
cause cells of the same type to produce differing amounts of gene products.
b. specify the developmental plan(s) for each segment.
c. are expressed in only one sex in any particular species.
d. are always the sites of lethal mutations.
e. control developmental timing.
b
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How many possibilities are there for a short nucleic acid sequence of six nucleotides?
A. 24 B. 64 C. 1,296 D. 4,096 E. 64,000,000
A good sampling method for quantifying the density of birds or bats is the use of
A. line transects. B. quadrats. C. pitfall traps. D. baited live traps. E. mist nets.
Do you think the widespread availability of human gene products, such as recombinant growth hormone, will lead to abuse in athletics? Why or why not?
What will be an ideal response?
A hormone that causes cell division and is found in coconut milk and in dividing root tissue is
A. ethylene. B. cytokinin. C. gibberellin. D. abscisic acid. E. auxin.