In ____, a pair of nonidentical alleles affecting the phenotypes of a given trait are both expressed at the same time in
heterozygotes.
a. pleiotropy
b. polygenic inheritance
c. complete dominance
d. codominance
e. a multiple allele system
ANSWER: d
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The promoters of positively controlled operons require activator proteins, because
A) RNA polymerase easily recognizes the consensus sequence. B) they are required to inactivate the repressor proteins. C) the promoters have nucleotide sequences that bind RNA polymerase weakly, which are not close matches to the consensus sequence. D) they are needed to bind to the allosteric site of RNA polymerase.
If the base sequence on one DNA strand is ATGGCCTAG, what is the sequence on the other strand of the helix?
What will be an ideal response?
Why is whole-exome sequencing cheaper and faster than whole-genome sequencing?
a. It only sequences the proteins produces by the DNA. b. It only sequences the DNA’s short, non-coding regions. c. It only sequences the DNA’s coding, exon-producing regions. d. It only sequences the promoter regions.
Which of the following is an example of reproductive cloning?
A. Bringing our favorite dog Buster back to life by producing a puppy with the exact same DNA B. Producing new skin cells from an individual's DNA to aid in skin grafts after a severe burn C. replicating the insulin gene for the production of transgenic bacteria D. All of the above