Viewtypetextitemidf401pageseq1 vertebrate limbs show

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Unformatted text preview: ameset? viewtype=text&itemID=F401&pageseq=1 Vertebrate limbs show homology Humerus Radius Ulna Carpals Metacarpals Phalanges Human Cat Whale Homology: parts of two organisms are attributable to a part present in a common ancestor. Forelimbs in mammals are homologous. Campbell 9e, Fig. 22.15 Bat Hyperphalangy in cetaceans Killer whale Sperm whale Right whale Humpback whale Ichthyosaur Cetaceans (whales, dolphins) have extra digit elements, a condition known as hyperphalangy. Cooper et al (2007). Anat. Rec. 290:654–672 Dolphins exhibit hyperphalangy Cooper, L.N. (2009). PhD dissertation, Kent State Univ. Spotted dolphin fetus A “hyperactive” AER in cetaceans may explain hyperphalangy Middle digits seem to keep forming much longer in cetaceans than in other m...
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This note was uploaded on 11/08/2013 for the course ZOOLOGY 470 taught by Professor Hardin during the Fall '12 term at University of Wisconsin.

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