Chromosomal rearrangements and speciation

摘要: Several authors have proposed that speciation frequently occurs when a population becomes fixed for one or more chromosomal rearrangements reduce fitness they are heterozygous. This hypothesis has little theoretical support because mutations cause large reduction in can be through drift only small, inbred populations. Moreover, the effects of on unpredictable and vary significantly between plants animals. I argue gene flow by suppressing recombination extending linked isolation genes than reducing fitness. unorthodox perspective significant implications models outcomes contact neospecies their progenitor(s).