Which pair of traits are least likely to be genetically correlated?
A. A morphological trait that works best with a specific behavioral trait
B. Two traits whose appearance varies based on the environmental conditions during development
C. Two traits that are in linkage disequilibrium with each other
D. Two traits that are affected pleiotropically by a single locus
E. Two morphological traits that must "fit" or "work" together
Answer: B. Two traits whose appearance varies based on the environmental conditions during development
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Answer the following statement true (T) or false (F)
A small group of islanders leave "island A" and travel to "island B." After several generations on island B, a researcher finds that a large percentage of the population is left-handed. Left-handedness is a relatively rare trait on island A. A genetic event that explains this is
A) a population bottleneck. B) genetic load. C) a founder effect. D) natural selection.
Which one of the following is a symptom of a heart attack?
A) increased cardiac output B) intense chest pain C) normal breathing D) pain in the knees E) pain in the right chest that radiates down the right arm
Due to character displacement, two closely related species may differ most morphologically when they
A. occupy different niches. B. share a common ancestor. C. are sympatric. D. occupy the same niche. E. are allopatric.