196 MENDELISM 
often represents the presence and absence respectively 
of a particular feature. 
BIBLIOGRAPHY. 
MENDEL, G. J.: Versuche ueber Pflanzenhybriden, 1865. 
= Ueber einige aus kunstlicher Befruchtung 
gewonnen Hieracium-Bastarde, 1869. 
Punnett, R. C.: Mendelism, second edition, 1907. 
Bateson, W.: Mendel’s Principles of Heredity, 1902. 
- Address to the Zoological Section, British 
Association, 1904. 
Lock, R. H.: In Annals of the Royal Botanic Gardens, 
Peradeniya, 1904. 
