In Figure 17-1, the purpose of electrical shock at the stage of the process labeled A is to:
a. kill the egg cell nucleus.
b. initiate fusion of the two cells.
c. stimulate cell division.
d. induce mutations.
e. initiate apoptosi
B
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One way to improve crop productivity is to modify flowering time. This can allow for multiple growing seasons in one year, and can also increase grain production because a smaller plant has lower resource needs. You are approached by an agricultural company that wants to create an early-flowering transgenic plant. Using your knowledge of Arabidopsis genetics, which genetic modifications would you suggest?
A. Inhibition of the embryonic flower ( EMF) gene or overexpression of the LEAFY (LFY) gene would work. B. Inhibition of the LEAFY (LFY) gene or overexpression of the embryonic flower (emf) gene would work. C. Inhibition of either the embryonic flower (emf) gene or the LEAFY (LFY) gene would work. D. Early flowering is not possible in Arabidopsis, and is not likely to be possible in other plants. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about EMF and LEAFY genes? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A variation of the PGD method, called ____________________, can test for genetic disorders in the egg before
fertilization Fill in the blank(s) with the appropriate word(s).
By the time pyruvate is formed, most of the energy contained in glucose has been released.
a. true b. false
Which is NOT true about PCR?
a. It amplifies DNA sequences. b. It is used in making DNA for cloning and sequencing. c. It uses DNA polymerases from psychrophilic microbes. d. It uses oligonucleotide primers that are complementary to the flanking regions of target DNA.