PLATE lO 



F, 



P 



2'^- 



Gametes. 



Zyiotes. 



P 

 Gametes. 



P 

 Zygotes. 



Products of the Masked Heterozygous Line 



Products of the Normal Heterozygous Line 



This array in Fz and through subsequent generations 

 continues to breed true to'type" appearing uniformly as 

 an extracted "sig type ". Is not the same as extracted sig. 

 type of other class of Fi heterozygotes. True condition 

 of the population is shown in this figure. 



Extracted Fz 

 sig. type 



Pu-Elp-Ac-AcElp-Pu 



Ma^sked Fz 

 Heterozygote 

 Pu'Flp-AcAc-Tlp-Pu 

 II 

 V 



Af asked Fz 

 Extracted diy type 

 Pu-TlpAc-AcTlp-Pu 



[div.-div.\ 



Eixtracted Fz sig. type 

 Breeds true and is 

 pure for characters 

 shown and like 

 parent sig. stock. 



Heterozygote 



Fz heterozygous type. Extracted div. type . 

 gives in fj duplicate Breeds true and is 

 of the Fz array and pure for characters 

 so on. shown and is like 



parent div. stock . 



Divers a. 



Extracted Fz 



sig type 



PuElp-AcAcElp-Pu 



Fz heterozygote 

 or mid. type 



PuElpAcAcElp-Pu 



■ / 



y 



Extracted Fz 

 div. type 



Pu-Elp-Ac-Ac-ElpFu 

 I 

 V 



- Union of these gametes produces a masked fz array that 

 appear as allofzhe s/g.tyjoe. True compositions shown above. 



Union of these gametes produces a typical Fz array of these types 



'Pu-Elp-.Ac Ac-Elpl-Pu Ao-Elp-Pu AcElp'Pu- 

 div.\y i^'c^-] f div.W 



Pu-Elp-Ac AcElp-Pu Pu-Elp-Ac Ac-Elp-Pu 



Heterozygous 

 --.ig. appearing type 



Normal type 

 of He terozy^ o te 



Pu-Elp-Ac Ac Elp-Pu 

 II 

 V 



Pu-Elp-AcAcElp-Pu 

 I 

 V 



These garr/etes when crossed under conditions of experiment 

 gives in F/ two types of heterozygotes in about equal numbers. 



Pu-Elp-A'^ aV- Elp-Pu 



Pu-Elp-Af Af-Elp- Pu 



14—^ r-\^l 



y fdiv\ ldiv\V 



PuElp-AfAf Elp-Pu 



Pu-Elp-AfAc-Elp-Pu 

 I 



L. signaticollis. 



L . diversa. 



Schematic representation of results obtained in crossing L. signaticollis and L. diversa under 



THE same conditions AS SHOWN IN PLATE 9, BUT REPRESENTING BEHAVIOR OF GAMETES AND CHARACTER OF 

 combinations WHICH HAVE BEEN SHOWN TO RESULT. 



.lULIUS UmN LITH., N . V. 



