The closer together two genes are on a chromosome,
A) the more likely there will be a recombination event between them.
B) the less likely there will be a recombination event between them.
C) the greater the chance that a double crossover will occur between them.
D) the more likely they are to be epistatic.
E) the less likely they are to be good genetic markers.
B
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Epithelial cells that are adapted for absorption or secretion usually have ________ at their free surface.
a. mitochondria b. cilia c. microvilli d. junctional complexes e. Golgi complexes
Which of the following statements does NOT describe a function of the cell walls of bacteria?
A. They maintain cell shape. B. They prevent cross-fertilization. C. They avoid disintegration in water with low concentrations of salt. D. They protect against other bacteria. E. They protect against viruses.
What percentage of the world's tropical forests have been cut down for cropland, fuel wood, grazing
land and timber? a. 20% b. 30% c. 40% d. 50% e. 60%
The fate of the mannose-6-phosphate receptors that bind and take up lysosomal hydrolases into lysosomal transport vesicles is that they
a. are transported to lysosomes and hold the lysosomal hydrolases there. b. are transported to lysosomes and degraded there. c. release the lysosomal hydrolases in the late endosomes and are recycled in vesicles back to the Golgi. d. are degraded in late endosomes, allowing the release of the lysosomal hydrolases.