INHERITANCE OF SEX AND RELATED PHENOMENA 203 
Taste XXXVI.—A Comparison or Crogs-over VaLurs rrom Norman AND Non- 
DissunctionaL Cuntures In Drosopnina (Datla from Bridges) 
XX cultures | NXXY cultures | 
Loci pom) ooo ae a = 7 = Ther eene | Eatconinns 
(ea Cross-over Cross-ove tes 
Total alte Total ete . 
leas) ea eee 
Vg Tier eee tact 2,600 24.4 2,436 | 26.0 1.6 | 6.6 
TAT sectou| cea I onus T2Sp i) ade7 | ndo8 14.2 
Wile ees ne 6,262 | 43.1 3,651 | 49.8 | 6.7 add 585) 
VWAB neta 1,699 | 43.6 257 | 53.0 | 9.4 21.6 
STV iar Ser Se aes 2,600 | 5.6 | 2,486 ise I Oe 4.6 
Viera 262 uilmeaoed il SS651 ly 22620) |) 44 19.6 
Vermilion XYY Male 
Reduction 
Fertilization of Eggs 
of Sable Female 
Sable Male (1) Wild Type Female (2) Wild Type Female(3) Sable Male (4) 
Fig. 92.—Diagram of secondary non-disjunction in the male. Four kinds of sperm 
are produced, but none of these lead to the production of phenotypic exceptionsin F1. 
(After Bridges.) 
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