More genes in vertebrates?
With the acquisition of complete genome sequences from several animals, there is renewed interest in the pattern of genome evolution on our own lineage. One key question is whether gene number increased during chordate or vertebrate evolution. It is argued here that comparing the total number of genes between a fly, a nematode and human is not appropriate to address this question. Extensive gene loss after duplication is one complication; another is the problem of comparing taxa that are phyl...Expand abstract
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