88 



EVOLUTION AND GENETICS 



n mi; 



0.0 ^ YELLOW 

 1.5 -- WHITE 



6.6-- ECHINUS 

 7.5^^ RUBY 



13.7 - - CROSSVNL'SS 14.0 



20.0 -: CUT 



27.5 - ■ TAN 



33.0 

 3a 1 



44.4 



56.5.. 

 57.0'' 



65.0 ■ 

 68.0 - 



CO - - STAR 



9.0 - - TRUNCATE 



29.0 - - DACHS 



VERMIUON 

 MINIATURE 



4a0-- SABLE 



GARNET 



,F0RKED 

 'BAR 



CLEFT 

 BOBBED 



650 



70.0 

 735 



\ 



0.0 + ROUCHOID 0.0.,; 

 0.5' 

 0.9 



STREAK 



25.3 SEPIA 

 25.8 = =''hAIRY 



465 -■ ' BLACK 



524 - - PURPLE 



38.5 

 42.0 

 455 



54.0 



59.0 4- CLASS 



635-1- DELTA 

 VESTIGIAL 655-- HAIRLESS 



67.5 i EBONY 

 LOBE 



720+ WHITE-OCELLI 

 CURVED 



97.5 -ARC 



95.4 



A 



/ 



985-- PLEXUS 



103.0 ■ : BROWN 

 105.0 * SPECK 



^BENT 

 \SHAVEN 

 EYELESS 



DICHAETE 



SCARLET 



PINK 



SPINELESS 



865 - - ROUGH 



CLARET 



95.7== MINUTE 



101.0 -- MINUTE-G 



Fig. 38. — Chart of the genes of the chromosomes of Drosophila. The 

 genes are arranged in the four linkage groups, I, II, III, IV. The 

 name of the gene is given to the right of its locus, and the distance of 

 the loci from one end of the chromosome is indicated bv the numbers 

 to the left of each locus. The "distance" gives the cross-over value for 

 the genes corrected for double crossing-over. 



