The Behavior of the Chromosomes as Studied through Liukage. 277 



Loci W and Sp. 



Repulsion. WSp Wsp wSp wsp 



New data 227 207 163 283 



Total, 410/780 = 52-6—. 



Loci R and B. 



Ttepulsion. RB Rb rB rb 



New data 86 83 34 39 



Coupling. 



New data 81 61 7 7 



Grand total, R and B, 193/398 = 48-5—. 



Loci Br aud Sp. 

 Coupling. BrSp Brsp brSp brsp 



New data .S60 310 417 354 



Total, 727 / 1441 = 50-5 — . 



Chromosomes I and in. 



Loci W and V. 



Coupling. WP Wp w»P w<'p 



Morgan and Bridges '13 403 382 .373 397 



Total, 755 / 1555 = 48-6 — . 



Loci Br and Eb. 



Repulsion. BrEb Breb brEb hreb 



New data 142 «8 130 128 



Coupling. 



New data 389 296 372 376 



Grand total, Br and Eb, 938 / 1921 = 48-8 +. 



Details of new Data. 

 Table XV. Single Crossing over in Chromosome I. 



XYw° XyW 

 XyW ^ 



Y$ y9 YWcT Yw»cf yWcT y W cT 



m') 356 332 1 322 276 2 



XYm XYm 



XyM^ 



MO m 9 YM(f YmcT yM (f ymcf 

 m(allw) 474 377 152 242 260 151 



') Data marked "m" are from mass cultures, those marked "s" are from single 

 females. 



