552 



MARY B. STARK 



TABLE 15 



(Sister by No. 1 male), F2 



(Sister by No. 1 male) 3 F2 



(Sister by No. 2 male) Mass F2 



The four daughters show the presence of a lethal. 



Summary: The nineteen tested females of 13, 2, 1, 4 (table 6) 

 gave a 2 : 1 ratio. Other tests showed that the three males 

 behaved Hke normal males. The explanation of her high ratio 

 (2 : 1) is that two lethal factors were present. 



