150 



MORGAN— THE CONSTITUTION OF 



[April 23, 



EGGS Of r, 



FEMALES 



/I 





RED LONG WMITC LONG 



Fig. 4. Diagram to show the inheritance of two pairs of recessive sex 

 Hnked characters, viz. white eyes (W) and miniature wings (M). The ncf- 

 mal, dominant allelomorphs of these factors are omitted. 



