VARIATION AND HEREDITY 133 



Crest in poultry. 

 Rose comb and 



comb. 

 Extra toes. 

 Broodiness. 



Unbanded shell 

 wood-snail. 



Absence of crest. 

 Pea Single comb. 



Normal four toes. 

 Absence of this 



instinct, 

 in Banded shell. 



PLANTS 



J^jninant character. 

 Peas : 

 Tall stems. 

 Yellow cotyledons. 

 Brown-skinned seeds. 

 Round seeds. 



Wheat: 



Absence of awn. 

 Rough and red chaff. 



Keeled glumes. 

 Flinty endosperm. 

 Susceptibility to 

 rust. 



Barley: 



Two-rowed ears. 



Nettles: 



Markedly dentate 

 leaves. 



Recessive character. 



Dwarf stems. 

 Green cotyledons. 

 White seeds. 

 Wrinkled seeds. 



Presence of awn. 

 Smooth and white 



chaff. 



Rounded glumes. 

 Floury endosperm. 

 Immunity to rust. 



Six-rowed ears. 



Slightly dentate 

 leaves. 



So far we have stated facts the results of 

 experiment but Mendel also suggested an 



