問題詳情
9. An earthquake decimates a ground-squirrel population, killing 98% of the squirrels. The surviving population happens tohave broader stripes, on average, than the initial population. If broadness of stripes is genetically determined, what effecthas the ground-squirrel population experienced during the earthquake?
(A) disruptive selection
(B) a genetic bottleneck
(C) directional selection
(D) a founder event
(E) stabilizing selection
(A) disruptive selection
(B) a genetic bottleneck
(C) directional selection
(D) a founder event
(E) stabilizing selection
參考答案
答案：B
難度：困難0.333333
統計：A(2),B(4),C(2),D(1),E(1)
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