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. 



Loci. 



Star purple. . . 



Streak purple. 



Dachs purple . 



Black purple. 



Purple vestigial 



Purple curved 



Purple plexus . 

 Purple arc 



Total. 



6,766 



1,027 



362 



8,155 



1,807 

 462 

 396 



2,665 



462 



1,027 



1,489 



773 



3,934 



5,001 



462 



.36,622 



2,1.30 



4>^,931 



825 

 2,839 



2,335 



5,001 



462 



2,1.39 



13,601 



3,934 

 1,807 



462 



952 



36,622 



6,766 

 593 



Cross- 

 overs. 



51,136 



344 

 2,625 



3,010 



413 



138 



3,561 



632 

 137 

 114 



883 



97 



196 



293 



38 

 212 

 322 



26 



2,214 



214 



3,026 



79 

 305 



303 



539 



60 



323 



Per 

 cent. 



1,609 



711 

 375 



90 



182 



7,222 



1,508 

 117 



10,205 



164 

 1,066 



44.5 



40.2 



38.1 



43.7 



35.0 

 29.7 



28.8 



33.1 



21.0 



19.1 



19.7 



4.9 

 5.4 



6.4 



5.6 



6.0 



10.0 



6.2 



9.1 

 10.7 



13.0 



10.8 

 13.0 

 15.1 



11.8 



18.1 

 20.7 



19.5 

 19.1 

 19.7 



22.3 

 19.7 



Date. 



19.9 



47.7 

 40.6 



July 11, 1915 



Aug. 24, 1916 

 July 21, 1917 



Nov. 6, 1913 

 May — . 1914 

 Aug. 24, 1916 



May—, 1914 

 Aug. 14, 1916 



Dec. 12, 1912 

 Aug. 28, 1913 

 Jan. 9, 1914 

 May — , 1914 

 Jan. 5, 1915 

 Mar. 5, 1917 



July 16, 1912 

 July 5, 1913 



July 5, 1913 



Jan. 9, 1914 

 May—, 1914 

 Mar. 5, 1917 



Aug. 24, 1913 

 Nov. 6. 1913 



May — , 1914 

 Aug. 24, 1914 

 Jan. 5, 1915 



Feb. 11, 1915 

 Feb. 8, 1916 



Feb. 29, 1916 

 Oct. 24, 1914 



By 



Bridges . 



Do. 

 Do. 



Bridges . 

 Muller. . 

 Bridges . 



Muller. 



Bridges . 



Bridges. 



Do. 



Do. 

 Muller . . 

 Plough . 



Do. 



Bridges . 

 Do. 



Do. 



Do. 



Muller . 

 Plough . 



Bridges . 

 Do. 



Muller . , 

 Bridges . 

 Plough . 



Bridges . 

 Do. 



Bridges . 

 Do. 



Reference. 



S'; 



S' 



-B.C., Ists; 1836-1894. 



Pr c Sp 



S' Pr 



S'; — ^ — J- B.C.; 4999-5110. 



S' 



S': B.C.; 7391-2. 



Pr 



Sk; Sk pr c balanced B.C.; 



II 103-124. 

 Am. Nat., 1916, p. 422. 



S'; 



S' 



Pr 



St 

 4999-5110. 



B.C., Sk only 



Am. Nat., 1916, p. 422. 



S'; 



S' 



Pr 



Sk 



-j- B.C.; 4999-5110. 



Pr; b Pr B.C.; C 174-11 2. 



Pr; b Pr c B.C., Ists; II 58-11 88. 



Pr; b p,.i!j balanced B.C.; II 141-674 



Am. Nat. 1916, p. 422. 



J.E.Z. 1917, total bprc B.C. contro 



J.E.Z. 1917, toialb PrVgB.C. contro 



Pr; Pr vg B.C.; B 36.1-B 39.2. 

 Pr; Pr Vg B.C. ; DA-DH. 



Pr; ^ B.C.; DI-DO. 



Vg 



Pr; b Pr Vg balanced B.C. ; II 141-67' 

 Am. Nat., 1916, p. 422. 

 J.E.Z., 1917, total b Pr vg B.C 

 controls. 



Pr; 6 Pr c B.C. Ists; II 58-11 88. 

 St; St Pr c balanced B.C.; 



II 103-11 124. 

 Am. Nat., 1916, p. 422. 

 sp; Pr c Sp B.C.; 452-508. 

 J.E.Z., 1917, b PrC B.C. controls. 



S' 



S'; B.C. Ists; 1836-'9 



Pr C Sp 



llla; PrCSpF2;32i)3-'8. 



llla; Pr Px Sp F2; 3535-'53. 

 Pt 



^' a Si 



B.C. 637-686. 



