CHARACTERS OF DISTINCT PAIRS 107 



namely presence of " rose " and absence of " pea " ; 

 the green wrinkled has two recessive characters, so has 

 the " single " — absence of both " pea " and " rose." 

 And the proportions in which these analogous things 

 occur in the second hybrid generation are the same, 

 thus : — 



9 " Walnut " 3 " Pea." 3 " Rose." 1 " Single." 

 [="Pea"and [=absence of both 



"Rose"] "Pea" and "Rose"] 



9 Yellow round, 3 yellow wrinkled, 3 green round, 1 green wrinkled. 



It will be remembered that it was said earlier in 

 this chapter that the same results would have followed 

 if, instead of crossing a yellow wrinkled with a green 

 round pea, a yellow round were crossed with a green 

 wrinkled. The two crosses only differ in the fact 

 that in the former each parent has a dominant 

 character, whilst in the latter both dominant 

 characters exist in one parent. The cross we have 

 described in the case of the fowl's comb, namely 

 " pea " by " rose," is analogous to the one displayed 

 in Plate III., namely, yellow wrinkled by green 

 round. In both cases each parent has a dominant 

 character. The cross in the case of the combs, 

 analogous to that between yellow round and green 

 wrinkled, is a cross between " walnut " (possessing, or 

 consisting of, two dominant characters, " pea " and 

 " rose ") and " single." Here, as in the case of the 

 peas, precisely the same results follow in the second 

 hybrid generation, namely 9 " walnut," 3 " rose," 

 3 " pea," and 1 " single." The appearance, in the 



