24 THE MENDEL JOURNAL 



I Seed albumen (cotyledons) yellow. I 

 I ,, „ ,, o-reen. j 



Plants tall — stem 6 to 7 feet. | 

 ,, dwarf — ,, i to f foot. J 



Crosses were made between plants possessing 

 one character of one or more of the pairs and 

 those possessing- the contrasted character or 

 characters. In each case the hybrids produced 

 exhibited one character only of each pair, and this 

 character, which always came out to the exclusion 

 of the other, Mendel called the " dominant " 

 character. The other he called the " recessive " 

 character, because it was not destroyed or 

 altered, but simply receded from view, so to speak, 

 when the dominant character was present in the 

 same plant. It is worth noting at this point, how^- 

 ever, ihat the phenomenon of dominance of certain 

 characters, although found in all seven of the pairs 

 of characters used by Mendel, is by no means of 

 imiversal occurrence, and moreover has nothing to 

 do with Mendel's Law. When dominance occurs, 

 it adds a complication to the results obtained in 

 breeding from the hybrids, causing an apparent 

 simplification w^hich is misleading without further 

 analysis, as will now^ be seen. 



By allowing the hybrids to be self-fertilised 

 Mendel next obtained for each pair of characters 

 results of the following nature : — 



5,474 round and 1,850 wa-inlded seeds, 

 6,022 yellow and 2,001 green cotyledons, 

 787 tall and 277 dwarf plants, 



