Which of the following is a key element of the Dobzhansky- Muller model of speci

Question

Which of the following is a key element of the Dobzhansky- Muller model of speciation, in which two lineages diverge from a single lineage? 2. which of the following is a key element of the y-Muller model of speciation, in which two lineages diverge from a single lineage? Selection for higher fitness in one lineage versus the other lineage Hybrid vigor appears in offspring generated by mating between the two lineages Fixation of incompatible alleles at different loci in the respective lineages The fixation of deleterious recessive alleles

Explanation / Answer

The following is a key element of the Dobzhansky-Muller model of speciation, is a model of the evolution of genetic incompatibility, important in understanding speciation and the role of natural selection in bringing it about. In this model two lineages diverge from a single lineage when:

Incompatible alleles at different loci become fixed in the two lineages.

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