Left-right asymmetry: more than one way to coil a shell.
Snail shells can be left-handed or right-handed, sometimes within one species. For over a century, it has commonly been assumed that mirror-image shell coiling in snails is correlated with a mirror- image reversal of early spindle orientation and cleavage. The results of an exciting and elegant new study refute this model, showing that right doesn't have to be the mirror image of left.
Wandelt
J
J
Department of Molecular and Cellular Biology, University of Arizona, Tucson, Arizona 85721, USA.
Nagy
L M
LM
D000818:Animals; D019521:Body Patterning / Q000235:genetics*; D002970:Cleavage Stage, Ovum / Q000502:physiology*; D008954:Models, Biological; D012399:Rotation; D012908:Snails / Q000033:anatomy & histology* / Q000196:embryology / Q000235:genetics; D008941:Spindle Apparatus / Q000235:genetics / Q000502:physiology