A baby is born with the genotype XYY. This sort of disorder is the result of nondisjunction during meiosis. In the case of the XYY genotype, can you be certain which parent had the nondisjunction in his or her gamete? Explain your answer
What will be an ideal response?
In this case, it can be certain that the nondisjunction was in the sperm cell. Because women do not have a Y chromosome, it would be impossible for the egg cell to contain a Y chromosome. The sperm must have contained two Y chromosomes.
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If you were given a bacterial strain with a mutation in the promoter region of the trp operon the most likely effect would be
A. interference with RNA polymerase binding. B. to block the repressor from binding. C. derepression of the trp operon. D. enabling the trp operon to be expressed in the absence of tryptophan. E. lack of expression of just the first gene in the operon. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about promoters? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Monomers are removed from polymers by ________ reactions
A) condensation B) hydrolysis C) neutralization D) substitution E) redox
Referring to Figure 43-4, which of the following would not be involved in producing a receptor
potential?
a. depolarization
b. the opening of a voltage-gated channel
c. the activation of a G protein
d. Na+
e. ADP
________ is the process whereby cells engulf pathogens and foreign substances
Fill in the blank(s) with correct word