DIPTERA (Continued) 



Species 



D. pseudoobscura 



Qiromosome Number 



2n n Remarks 



Typo L 



Drosophila ananassae 

 ( D. caribbea ) 



10s 



106m 

 lOom 



106m 

 lOom 



8s, o 



Observer 



References 



10s 5^(1,11) 



X-Yo\ Size 

 of Y differs 

 according to 

 strains. 

 Meiosis irreg- 

 ular in F^ 

 between strs. 



6 in sail- Tan '35 

 vary in 2 



strains. 



Darlington Genet. 19. 

 13U 



Genet. 20. 



5ftl.ll) 



Y degener- 

 ates in II- 

 div. in 

 •Sex-ratio' 

 t. 



x-y£ 



X-Y6* 



F-|_ not 

 develop , 



Sturtevant & Genet. 21. 

 Dobzhansky '36 



Koller «36 J.G. 32. 



Kaufmann'W) J.M. 66. 



Cooper 'I»4 Proc. Hat. Acad. 



Sci. 30. 



Kaufmann'i+O J.M. 66. 



t+ V's+2 J's+2 R's+2 S 



•a ($) 



C-Yo^ 



Metz 'l6a,b J.S.Z. 21; A.H. 

 50- 



Sturtevant & A.N. 70. 

 Dobzhansky 1 36 



7 in 

 salivary 



Dobzhansky & 

 Sokolow '39 



6 V's+2 v's (9) 



X-y£ Metz '16 



J.H. 30. 



A.N. 50. 



-211- 



