Most DNA-Based Phylogenetic Analyses Place Humans and Chimpanzees (Including Bonobos)as

question 27

Multiple Choice

Most DNA-based phylogenetic analyses place humans and chimpanzees (including bonobos) as each other's closest relatives,but a persistent minority of studies place gorillas and chimpanzees as sharing a common ancestor that was not a human ancestor.The reason is incomplete lineage sorting,which simply means that ________.

• A) the ancestral species of all great apes was genetically variable at some loci, and each descendant species lost different random combinations of ancestral alleles
• B) the labs that sequenced great ape DNA made a simple procedural error
• C) mitochondrial genes can become unlinked and be inherited by independent assortment
• D) primate lineages are not completely reproductively isolated and can hybridize
• E) coding regions of the primate genome are more likely to give false results than noncoding regions such as SINEs

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