Fig. 1
From: Heterochirality results from reduction of maternal diaph expression in a terrestrial pulmonate snail
(a) Adults of Bradybaena similaris. (a) Wild B. similaris (dextral). (b) Racemic mutants of B. similaris. Dextral (left) and sinistral (right) ones. Wild-type strain that produces clockwise-coiled (dextral) snails and a mutant strain that produces either clockwise or counterclockwise-coiled (sinistral) snails (right). (c) B. similaris lays several tens eggs during a period of several hours. (b) Embryos of B. similaris. (a)-(d) Embryos from a wild individual. (e)-(g) Embryos from a racemic mutant individual. (a) egg, (b) 2-cell, (c) 4-cell, (d)-(g) 8-cell. Cleavage directions are shown by red lines. Cells divide clockwise direction (d) in wild 4-cell embryos from animal pole view, while clockwise to counterclockwise direction (e)-(g) in racemic mutant ones