Abstract

The genome contains all of the genetic information of a given organism; thus comparative genomics of deuterostome taxa is expected to offer insights into the origin and evolution of chordates. Now, decoded genomes of a sea urchin (Echinodermata), acorn worms (Hemichordata), lancelets (Cephalochordata), ascidians and a larvacean (Urochordata), and vertebrates (Vertebrata) are available. Comparisons of these genomes may tell us what genomic modifications were involved in diversification of ancestral deuterostomes into ambulacrarians, chordates, or vertebrates.

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