Heredity and Environment 



FIG. 101. TYPICAL AND MUTANT FORMS OF Drosophila melanogaster, 

 A, Typical Female. B, Typical Male. C to H, Mutants resulting from 

 mutations of genes in Chromosome Pair I (XX or XY) at "Loci" indi- 

 cated. C, "Rudimentary" Wing (54-5). D, "Miniature" Wing (36.0). 

 E, "Cut" Wing (20.0). F, "Forked" Bristles (56.5) and "Bar" Eye 

 (57.0). G, "White" Eyes (1.5). H, "Bar" Eye (57.0) seen from left side. 

 ("Figures loaned by Professor Morgan.) 



