Table 1. Frequencies of bz-s and Bz′ Derivatives from bz-m39(Ac) Female and Male Parents.

Cross	Type of Derivative	Effective Population	No. of Selections	Frequency (×10−3)	Bz′: bz-s	Male: Female
Sh bz-m39(Ac) wx x sh-bz-X2 wx	bz-s	5690	11	1.9	27.8	2.7
sh-bz-X2 wx	Bz′	466	25	53.6		1.8
sh-bz-X2 wx x Sh bz-m39(Ac) wx	bz-s	11870	61	5.1	18.8
sh-bz-X2 wx	Bz′	550	53	96.4