SEX-LINKED FACTORS IN DROSOPHILA 53 



TABLE 8 

 (The meaning of the phrase 'proportion of cross-overs' is given on p. 45) 



BO. Pi: gray eosin 9 X yellow red d^ 

 Fi : gray red 9 X gray eosin cf 

 Fo: 9 9, g.r. 241, g.e. 196 



d'cf, g.r. 0, g.e. 176, y.r. 195, y.e. 2 



2 

 Proportion of cross-overs, t;;- 



BP. Pi: gray red 9 X j^ellow vermilion c? 



Fi : gray red 9 X gray red c? 

 F2: 9 9, g.r. 98; 



cf'cf , g.r. 59, g.v. 16, y.r. 24, y.v. 33 



Back cross, Fi gray red 9 9 from above X yellow vermilion <fc^ 

 F2: 9 9, g.r. 31, g.v. 11, y.r. 12, y.v. 41 



d'd', g.r. 23, g.v. 13. y.r. 8, y.v. 21 



Pi: gray vermilion 9 X yellow red cf 



Fi : gray red 9 X gray vei-milion cf 

 Fo: 9 9, g.r. 199, g.v. 182 



d'd', g.r. 54, g.v. 149, y.r. 119, y.v. 41 



Pi: yellow vermilion 9 X gray red cf 



Fi : gray red 9 X yellow vermilion d^ 

 F2: 9 9, g.r. 472, g.v. 240, y.r. 213, y.v. 414 



d'd', g.r. 385, g.v. 186, y.r. 189, y.v. 324 



Fi: gray vermilion X yellow red (sexes not recorded) 



Fi : gray red 9 9 . These were mated to yellow vermilion cf cf of other stock 

 F2: 9 9, g.r. 50, g.v. 96, y.r. 68, y.v. 41 



cf cf , g.r. 44, g.v. 105, y.r. 86, y.v. 47 



1464 

 Proportion of cross-overs, adding 9 9 from BOPR (below), 



4551 



BR. Pi miniature yellow 9 X long gray cf 



Fi: long gray 9 X miniature yellow cf 

 F2: 9 9 l.g. 14, l.y. 2, m.g. 7, m.y. 6; 



d'd' l.g. 10, l.y. 1, m.g. 6, m.y. 8. 



Pi : long j'ellow 9 X miniature gray cf 



Fi : long gray 9 X long yellow cf 

 F2: 9 9, l.g. 148, l.y. 130 



d'c?', l.g. 51, l.y. 82, m.g. 89, m.y. 48 



115 

 Proportion of cross-overs, rrr 



