If genetic contribution to variation in a trait is negligible:
A. identical twins will be more similar to one
another than fraternal twins are to one
another.
B. fraternal twins will be more similar to one
another than identical twins are to one
another.
C. identical twins will be no more similar to
one another than are fraternal twins.
D. identical twins will be no more similar to
one another than each is to any other sibling.
E. None of these choices is correct.
D
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Name the fluid-filled interior of the chloroplast.
A. Stomata B. Thylakoids C. Grana D. Stroma
Which is not correct about Mycobacterium species?
A. It is an acid-fast bacterium. B. Cells appear as long, slender rods via microscopy. C. All species are human pathogens. D. It exhibits a very slow growth rate. E. Cell walls have waxy lipids.
All of the following have been produced by inserting human genes into bacteria EXCEPT
A) cancer-cell-killing hormones, which cure patients who have malignancies. B) insulin, which treats diabetics. C) growth hormone, which helps children grow normally. D) clot-dissolving enzymes, which help heart attack victims recover. E) blood-clotting enzymes, which treat hemophiliacs.
Beside the distortion in the DNA backbone caused by a mismatched base pair, what additional mark is there on eukaryotic DNA to indicate which strand needs to be repaired?
(a) a nick in the template strand (b) a chemical modification of the new strand (c) a nick in the new strand (d) a sequence gap in the new strand