Sex-limited inheritance in Lychnis dioica L. 293 



Synonymous formulae: 



(1) FFmm = 9, FFMm = rf 1 (Shull 1911). 



(2) 00 = 9, fO l ) = d 71 (Morgan 1911a). 



(3) 00 = 9, XO = cT (Pinney 1911). 



(4) YY = 9, XY = <? (Wilson 1910, Stevens 



(5) aa = 9, Aa = cT (Baur 1911). 



(6) 99 =9, 99d" = tf (Shull 1910). 



3. The female is assumed to be a neutral homozygote. 



Model formulae: XXFF = 9, XXFM = cT, 



or simply, FF = 9, JPJIZ = cT. 

 This formula has been used by SHULL (1911). 

 Synonymous formulae: 



(1) ff =9, (f)m = cT (Schleip 1912). 



(2) ww = 9, wm = cf (Correns 1907). 



(3) 99 = 9, 9cT = cT (Morgan 1911a, Smith 1906, 1910). 



(4) 99 = 9, (9)cT = cT (Wilson 1909). 



B. The female is heterozygous, the male homozygous. 



Examples: Echinoidea, Lepidoptera, Aves. 



4. The male is assumed to be a positive homozygote. 



Model formulae: XXMm = 9, XXMM = cT, 



or simply, Mm 9, M M = cT. 



These formulae have been used by STUETEVANT (1912 a, b) and 

 BRIDGES (19 13 a). 



Synonymous formulae: 



(1) FFMm= 9, FFMM= 3 (Goldschmidt 1912, 1913, 



Sturtevant 1912a, Correns and 

 Goldschmidtl913,Goldschmidt 

 and Poppelbaum 1914, Gersch- 

 ler 1914). 



(2) XO =9, XX =<? (Gerould 1911). 



(3) xo = 9, xx = cT (Gerould 1911). 



(4) xO =$, xx =J (Hertwig 1912). 



(5) YO = 9, YY =tf (Gulick 1911). 



J ) This formula becomes comprehensible when it is known that in the paper in 

 which the formula appears, MOKGAN does not follow the usual method of letting the 

 lower-case letter denote the absence of a determiner whose presence is indicated by the 

 corresponding capital. 



