Bacteriophages can be used as vectors in recombinant DNA experiments because they
A) are small and made of double-stranded DNA.
B) are circular and easily imported into bacteria or yeast.
C) insert their genetic material into bacteria.
D) are resistant to protective restriction systems.
C) insert their genetic material into bacteria.
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Drosophila eggs acquire an initial asymmetry before fertilization as a result of
A. production of bicoid proteins in one end of the egg. B. maternal DNA molecules being deposited in one end of the egg. C. nurse cell migration to one end of the egg. D. maternal mRNA being deposited in one end of the egg. E. attachments of cadherins to one end of the cell.
In Mendel’s hybridization experiments, the ratio of plants expressing dominant traits in the F2 generation was nearly 3:1, but never exactly the correct ratio. Ignoring any external confounding factors, what effect would you expect a larger sample size to have on the ratio of dominant to recessive traits expressed?
a. Larger sample sizes would have no effect on the ratio. b. The results would drift further from the expected ratio. c. The results would become more precise with more samples. d. Larger sample sizes would increase the risk of cross-contamination.
Babies were accidentally switched at the hospital! Mr. and Mrs. Fire both have type O blood. Which of the following four babies of the same age is most likely the Fire child?
A) baby with type A B) baby with type AB C) baby with type B D) baby with type O
Aligning genome sequences from different organisms to determine their evolutionary history is referred to as ________
A) metagenomics B) evogenomics C) comparative genomics D) stone-age genomics