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American Zoologist 1974 14(3):867-879; doi:10.1093/icb/14.3.867
© 1974 by The Society for Integrative and Comparative Biology
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Asymmetry Revisited

JANE M. OPPENHEIMER
Department of Biology, Bryn Maiur College Bryn Mawr, Pennsylvania 19010

Interest in the developmental basis of symmetry and asymmetry, as old as experimental embryology itself, has recently become reactivated. A brief survey is made of recent or current activities in the following areas: (i) development of asymmetry in the chick limb bud, as related to the so-called zone of polarizing activity (Saunders et al.); (ii) situs inversus viscerum in amphibians, as induced by transplantation and defect experiments, radiation, and chemical treatment (von Woellwarth, von Kraft, Wehrmaker); (iii) situs inversus viscerum in mammals as related to (a) twinning (Cockayne, Torgerson, Baker-Cohen); (b) genetics (Feldman, Cockayne, Torgerson for man, Tihen et al., Hummel and Chapman for mouse); and (c) teratogens (Layton and associates); (iv) ultrastructure in snails (Morrill and Perkins); (v) asymmetry developing as a result of changes in chemical instability in homogeneous systems (Ortoleva and Ross); (vi) asymmetrical mentality (Sperry and associates). No general conclusions are attempted.


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