問題詳情
72. The tails of UCSD campus male dark-eyed juncos were, on average, 36% white, whereas the tails of male juncos from theoriginal colonizing population averaged 40-45% white. If this observed trait difference were due to a difference in theoriginal colonizing population, it would most likely be due to ______.
(A) a genetic bottleneck
(B) a founder effect
(C) gene flow between populations
(D) mutations in the UCSD population
(E) stabilizing selection
參考答案
答案：B
難度：困難0.333333
統計：A(1),B(1),C(0),D(0),E(0)