E. R Saundkrs ir)3 



Mesultn obtahii'.d in I'\ when a coloured half-lwarij form ivas bred with 

 Jully hoary or glabrous types. 



Expt. 



(1) Hoary wliite (iiicaiia) (CRIIK) x J hoary 

 / Glabrous coloured (azure) (Clill) x ,, 



(2) J Reciprocal mating with flesh (Clill) 

 I instead of azure x „ 



(3) i hoary x glabrous sulphur-white (RHK) 

 I Glabrous coloured (marine) (C'i( A') x J hoary 

 ( Ueciprocal mating 



j Glabrous white (C/i) x „ 



I Reciprocal mating 



(5) 



(G) Glabrous sulphur-white (CK) x ,, 



Results obtained in F., from the matings mentioned above. 



!■■! 



(a) From F^ x self ■ '— ^-^— ^~-. 



Half- Quarter- 

 Expt. Parents Iloary hoary hoary Glabrous 



(7) i hoary X glabrous flesh (C'fiH) Fi = H I'i 7 1 17' 



(8) „ X glabrous sulphur-white (flW/i) ^, = 7/ 41 13 3 3' 



(9) Glabrous marine (CiWi) X A hoary Fi = \H — 181 2'J7-hx 163 -I- y 



(10) „ sulphur-white (CA')x 4 hoary J''i = iH — 2 4 1 



(b) From Fi x a glabrous type 



(11) [i hoary x flesh (CRU)^ x flesh (CRH) 14 — — 13 



x + tj = 70. See reference in text. 



Results obtained in F.j from the self -fertilisation of F„ individuals 



obtained in Experiment 9. 



Expt. 12. 8 F-i half-hoary individuals self- fertilised yielded only half-hoary offspring 



(88, 63, 27, 37, 54, .59, 45, 27, respectively, making a total of 400). 



Expt. 13. 3 F-i glabrous individuals self-fertilised yielded only glabrous offspring (17, 38, 



34 respectively, making a total of 89). 



Expt. 14. 9 F-2 quarter-hoary individuals yielded a mixture of the three forms as follows: 



Glabrous or 



Half-hoary Quarter-hoary quarter-hoary Glabrous 



(1) 26 41 10 20 



(2) 18 29 5 15 



(3) 11 13 2 4 



(4) 32 38 5 27 



(5) 9 34 7 13 



(6) 8 14 7 3 



(7) - 2 - 1 



(8) 3 3 17 



(9) 14 24 8-4 



Totals 121 198 4- .c .r=-»- 45^=1/ U + y 



( = x + y) 

 Expectation 114^ 229 — H4J 



' In experiments 7 and 8 such a large proportion of the seeds failed to germinate that a 

 wider deviation from the exjiected numerical result than one would ordinarily anticipate 

 may well occur. For the expectation in these cases see p. 157. 



