192 



THE SECOND-CHROMOSOME GROUP 



Table 45 gives a detailed summary of all these data collected according 

 to two loci calculations. The black purple cross-over value of 6.2 

 based on 48,931 flies places the locus of purple at 6.2 units to the right 

 of black, or at 52.7 when referred to star as the zero-point. 



TABLE 45. Summary of purple cross-over data. 



