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The haploid amount of DNA in teleost fishes ranges from 0.40 to 4.4 picograms. Almost all the teleost groups with low amounts of DNA per cell are considered to be evolutionally advanced. Most of the groups with large amounts of DNA per cell are more primitive and more closely related to ancestral forms. It is proposed that evolution and specialization in the teleosts have been accompanied by loss of DNA.
Ralph T. Hinegardner (Fri,) studied this question.