This diagram of a cellular structure shows
A. one crossed-over pair of chromosomes
B. two homologous chromosomes
C. one tetrad of chromatids
D. two sister chromatids
Ans: D. two sister chromatids
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Morpholinos are
A) short DNA sequences found only in populations that trace their roots to Italy. B) short synthetic molecules similar to DNA that are complementary to splice-site mutations. C) types of DNA microarrays used to study gene expression. D) a type of recombinant bacteria.
If a given depolarizing event causes one action potential, which of the following might increase the likelihood of a second action potential being produced given the same stimulus as before
What will be an ideal response?z
Which is an example of a structural homology?
A. The same group of embryonic cells forms the adult jaw of a perch and of a dog. B. All vertebrate embryos form a post-anal tail. C. All organisms share a common genetic code. D. Vertebrate forelimbs have the same number and arrangement of bones.
Staphylococcus saprophyticus causes
A) cystitis. B) pyelonephritis. C) vaginitis. D) gonorrhea. E) syphilis.