176 GENETICS 



Group II: Second chromosome (autosome). Mendellan 

 Inheritance. 



Eye Color or Structure: Purple, pinkish, cream, star, 

 morula, etc. 



Body Color and Pattern: Olive, black, streak (thorax), 

 comma, trefoil, speck, patched abdomen, etc. 



Wings: Truncate, balloon, vestigial, blistered, jaunty, 

 curved, strap, apterous (and many others). 



Bristles: Fringed, minute, vortex. 



Life and Health: Lethals (several). 



Thus chromosome II affects many parts of the body. 



Group III: Third chromosome (autosome). Mendelian 

 Inheritance. 



Eye Color or Structure: Claret, cream III, deformed, 

 kidney, maroon, pink, peach, rough, scarlet, sepia, etc. 



Body Color or Pattern: Band (thorax), ebony, sooty, 

 trident, etc. 



Body Structure: Bithorax, dwarf, giant. 



JVings: Beaded, spread, tilt, truncated, etc. 



Bristles: Doubled, hairless, hairy, minute, spineless, two- 

 bristle, vortex III, etc. 



Life and Health: Several lethals. 



Thus chromosome III also affects many parts and func- 

 tions. 



Group IV: Fourth chromosome (autosome). Mendelian 

 Inheritance. 



Eyes: Eyeless. 



JVings: Bent; cubitus interruptus. 



Bristles: Shaven. 



Few genes known, but affecting diverse parts of the body. 



What does the foregoing list of characters affected by 

 the different chromosomes show as to the nature and func- 

 tions of the chromosomes? 





