Treating DNA from different bacteria with the same restriction enzyme followed by separation of the fragments by electrophoresis is known as
A. DNA base composition.
B. DNA fingerprinting.
C. the nucleic acid amplification test (NAAT).
D. ribotyping.
Ans: B. DNA fingerprinting.
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In 1910, Morgan did a series of experiments with the fruit fly Drosophila, an organism where females are XX and males are XY. When a mutant male fly with white eyes was crossed with a wild type female with red eyes, none of the F1 progeny had white eyes but 18% of the F2 progeny had white eyes. Unexpectedly, all of these white-eyed F2 flies were males. Based on these results, Morgan concluded that white eyes is caused by a recessive X-linked allele. Suppose Morgan had found that half of the F1 progeny had white eyes but all of these white-eyed F1 flies were females. In this case, a valid hypothesis would be
A. White eyes is caused by a recessive Y-linked allele. B. White eyes is caused by a dominant Y-linked allele. C. White eyes is caused by a dominant X-linked allele. D. White eyes is caused by a dominant autosomal allele. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about X-linked inheritance? 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?
Respiration is controlled by sensors and effectors in the brain and carotid arteries that respond to a rise in ______ by ______ the rate of breathing
a. O2; decreasing b. O2;increasing c. CO2;decreasing d. CO2;increasing e. NO; decreasing
Which of the following enzymes and their functions is mismatched
A. Helicase-unwinds the supercoiled DNA B. DNA ligase--joins nucleic acids together C. DNA polymerase-removes bases from DNA D. RNA polymerase-synthesizes primer E. RNA polymerase-synthesizes okazaki fragments
Which of the following is the dominant stage of the Bryophyte moss lifecycle?
a) sporophyte b) gametophyte c) lycophyte d) pterophyte e) stomatophyte