CAS BI 107 Lecture Notes - Lecture 9: Speciation, Bet Her, Centromere
4 Nov 2016
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Document Summary
Isolated populations evolve to become different species o: species evolve, adapting to different environmental conditions. Sympatric speciation: population in same area have to diverge into more species, more difficult to accomplish, e. g. species forming on same island. When population comes come back together, many different results may occur. Secondary contactbreeding opportunities occur but now not breeding compatible. Centric fusion (two chromosomes combine at centromere) Different environment may have different combination of chromosomes. Mule is hybrid which can"t breed because there is a difference in number of chromosomes on horses and donkeys. On small islands, anolis carolinensis moved to higher perches following invasion by. Limbs changed in sizes with six habitat ecomorphs on islands in the islands. An adaptive radiation is the evolution of ecological and phenotypic diversity within a rapidly multiplying lineage. Range of birds remarkable even when compared to rest of world. No better example of evolution than darwin"s finches!!
