If the frequency of a recessive gene in a population
under genetic equilibrium is 40 percent, in the next
generation the frequency of that gene would be
a. 20 percent.
b. 40 percent.
c. 80 percent.
d. 2pq.
e. unpredictable.
Answer: b
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This figure showing E. coli DNA polymerase ? subunit suggests:
A. the majority of the ? sheets are between the polypeptides. B. the polymerase contains only antiparallel ? sheets. C. the ? helices contain several acidic R groups. D. the ? helices contain several basic R groups. E. substitution of amino acids within the polypeptides would not alter enzyme function.
A husband and wife are in the process of getting a divorce. During child-support hearings, the husband states that he should not pay child support as he feels that the child was actually fathered by one of the woman's various lovers. DNA restriction analysis was performed, with the results illustrated in the diagram below.
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The DNA of the husband in this case can be found in lane 3, whereas that of the suspected father is in lane 4. Based on this information,
A) the husband is definitely the child's father.
B) the husband is definitely not the child's father.
C) either man could be the father, and more tests are needed to discern paternity.
D) neither man in question is the child's biological father.
Which of the following human extraembryonic
membranes forms the urinary bladder? a. amnion b. yolk sac c. chorion d. allantois e. none of these
Prokaryotic RNA transcripts undergo splicing
a. true b. false