Which genetic mechanism is most likely responsible for the evolutionary origin of new and complex plant structures,
such as flowers?
a. gene duplication
b. asexual reproduction
c. genes coding for flower development
d. mutations in noncoding regions
e. gene splicing
ANSWER: a
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Amanda was studying turtles based on DNA analysis. Under the current classification scheme, which of the following turtle species are thought to be most closely related? (1) Graptemys ouachitensis, (2) Trachemys scripta, (3) Apalone spinifera, (4) Graptemys kohni
A. 1 and 3 due to inductive reasoning B. 1 and 3 due to deductive reasoning C. 2 and 3 due to inductive reasoning D. 1 and 4 due to inductive reasoning E. 2 and 3 due to deductive reasoning F. 1 and 4 due to deductive reasoning
Of the proteins associated with chromatin, which of the following represents the largest component?
A. histones B. topoisomerases C. SMC proteins D. transcriptional regulators E. ribosomal proteins
Which of the following are primate characteristics? Check all that apply.
_____ grasping hand _____ large brain _____ claws on each digit _____ forward-facing eyes _____ complex social behavior
Crossing over is often reduced around centromeric regions of chromosomes. If you were trying to construct a genetic map of two linked marker loci in this region, what result might you obtain?
A. The recombination frequencies would be high, and you would deduce that the markers were very far from one another. B. The recombination frequencies would be low, and you would deduce that the markers were very far from one another. C. The recombination frequencies would be high, and you would deduce that the markers were very close to one another. D. The recombination frequencies would be too low to detect, and you would not be able to estimate the distance between genetic markers. E. The recombination frequencies would be low, and you would deduce that the markers were very close to one another.