What is the difference between polygenic and pleiotropy?
What will be an ideal response?
Polygenic traits are controlled by multiple genes. Pleiotropy means that a single mutation results in
many different phenotypes.
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In radishes, red and white are the pure-breeding
colors, and long and round are the pure-breeding shapes, while the hybrids are purple and oval. The cross of a red, long radish and a white, round radish will produce an F2 generation in which a. the most common phenotype will be oval and purple. b. the purple color will occur with all three shapes of radish. c. the red color will occur with all three shapes of radish. d. all white, long forms produced will be purebreeding. e. all of these are true.
A plant with purple flowers is allowed to self-pollinate. Generation after generation, it produces purple flowers. This is an example of
A) hybridization. B) incomplete dominance. C) true-breeding. D) the law of segregation. E) polygenetics.
_____ can have similar effects on population sizes as predators; that is, keeping populations below carrying capacity and limiting competitive exclusion
A. Parasites B. Interspecific competitors C. Facultative mutualists D. Commensals E. Obligate mutualists
Which of the following are used solely to study protein-protein interactions? Select all correct choices
A. Western blotting B. immunoprecipitation C. tandem affinity purification (TAP) D. yeast two-hybrid analysis E. yeast three-hybrid analysis