Cystic fibrosis is most often caused by the CFTR?F508 mutation. This mutation:
A. reduces the function of a chloride ion channel.
B. increases ATP binding to chloride.
C. is autosomal dominant.
D. causes symptoms in carriers.
A
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Which of the three types of viruses shown above would you expect to include a capsid(s)?
A) I only B) II only C) III only D) I and II only E) I, II, and III
Most human embryos that are aneuploid
A. result in Down's syndrome. B. result in sterility. C. are spontaneously aborted in the first trimester. D. can develop and survive to adulthood. E. are usually the result of increased nondisjunction in the gametes of older men.
To produce a genomic library DNA, DNA fragments are incorporated into plasmids that are introduced into bacteria
__________________ Indicate whether the statement is true or false.
Which of the following statements best describes the rationale for applying the principle of parsimony in constructing phylogenetic trees?
A) Parsimony allows the researcher to "root" the tree. B) Similarity due to common ancestry should be more common than similarity due to convergent evolution. C) The molecular clock validates the principle of parsimony. D) The outgroup roots the tree, allowing the principle of parsimony to be applied.