An Eyeless Mutant in DROSOPHILA HYDEI.

INTRODUCTION. ................................................................. Concerning Drosophila replete and allied species. .................................... Origin and description of the new eye mutant, variable.. ............................. Early history of the behavior of variable in inheritance.. ............................ Behavior of variable under a controlled temperature.. .............................. Linkage of variable and scarlet.. .................................................. Stage in the life cycle of the fly at which the environmental influence is exerted. . . . . . . . . Crosses involving different combinations of scarlet and variable and their normal allelomorphus under different temperature conditions. ... .................................. Observations on the stock cultures of variable.. ..................................... Record of two eye mosaics.. ...................................................... DISCUSSION.. .. ................................................................ SUMMARY.. .. ................................................................. LITERATURE CITED.. ............................................................. 319 320 32 1 322 323 323 325