GENES AND CHARACTERS 



311 



group, hence a study of various combinations should indicate 

 the spatial relations between their genes in the chromosome. If, 



13.7- - cross-veinleaa 

 16.7- - club 



20.0 

 21.0 



27 5 



36.1 

 37.5 

 38.0 



36J: 



53.5 



54.5_ 

 66.5. 

 57.0 

 58.5 

 69.5 



yellow, scute 

 lethal 7 

 broad 

 prune 



white 



notch 



abnormal 



echinus 



bifid 



ruby 



cut 

 ^singed 



tan 



33.0-|- vermilion 



tiny-bristlea 

 ^miniature 

 :~dusky 

 furrowed 



43.0- - sable 

 44.4 - garnet 



1- - small-iving 

 .rudimentary 

 ■forked 



, -bar 



i-|- small-eye 

 fused 



65.0- ■ cleft 



-2.0- 



0.0- - star 



1.0 



4.0- - expanded 



9.0-1 



11.0 

 13.0 

 14.0- - 



22.5 



28.0- -flipper 

 29.0- - dacha 



83. 

 35. 



44.0 



46.5 

 46.7- 

 48.5- 



62.5 



0- - 



58.0 

 61.0 



65.0- 

 66.5- 

 67.0- 



70.0- 

 71.0 



73.5 

 75.0- 



telegraph 



aristaless 



truncate 



gull 



pin k-uiing 



streak 



cream-b 



ski 

 squat 



minute-B 

 plack 

 '•jaunty 

 apterous 



. purple 



T7.0- - roof 



105.0 



85.0 

 88.0- 



95.0- 



97.5- 



98.5- 

 lOO.Q. 

 101.0 

 103.0 

 101.5 



105.E 



safranin 



trefoil 



vestigial 

 telescope 

 ••dash 



lobe „, 

 minute 511 



curved 

 ^dachsou3 



minute 2 

 humpty 



purpleoid 



^arc 



plexus 



lethal 11a 



brown 

 ■^blistered 

 •^■morula 

 ^speck 

 '^balloon 



CO- - roughoid 



25.3 



25.8- 



82.0 

 33.5. 

 34.0 



38.3. 

 38.5- 

 40.5 

 41.5- 

 43.0 

 44.0 

 45.0: 

 45.5 



M n 53.8. 



55.0 



56.0 



60.6 



61.0 



63.5- 

 65.6 

 67.5- 

 68.0- 

 70.0 

 72.0- - 



sepui 

 hairy 



divergent 

 cream III 



-divarfoid 



-scarlet 



till 

 -dichaet 



ascute 

 •^deformed. 

 ~^maroun 

 - curled 

 -dwarf 

 ^pink 



,two-brisile 

 -spineless 

 ^bithorax 

 ^bithoraxoiOr 



glass 



kidney 

 ^giant 



spread 



delta 

 ^hairless 



ebony 

 -band 



cm 



white oeellS 



1.5- - rough 

 89.0- - beaded 



95.4. . claret 

 95.7~|-^ minute 



0.0-1- 



bent 

 eyelesez\J.O 



Fig. 178. — Chromo.some maps of Drosophila. (From Walter, after Sharp.) 



for example, crossing over occurs between B and C in 5 per cent 

 of cases, and between A and C in 25 i)er cent, we may con- 



