BIO120H1 Lecture : Bio lab 5 notes Nov 30 2009
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24 Aug 2010
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According to the model by Case and Taper, gene flow may play arole in limiting species ranges because
A)
alleles moving into the marginal populations are not adaptivefor the conditions at the margins of the species range
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species in the edges of the range are hybridizing, and hybridsbetween species have lower fitness
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because gene flow reduces genetic variation in marginalpopulations D) | ||
gene flow from populations at the margin of a species range topopulations in the center reduces the size of populations in themargins, thus reducing genetic variation and limiting adaptiveevolution of populations near the edge of the range |