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An Introduction to 



Heredity and Genetics 



A Study of the 



Modern Biological Laws 

 and Theories 



relating to 



Animal & Plant Breeding 





W. LOCHHEAD 



Professor of Biology in (he Macdonald College 

 of McGill University 



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"An exact determination of the laws of heredity 

 will probably work more change in man's outlook 

 on the world, and in his power over nature, than 

 any other advance in natural knowledge that can be 

 clearly foreseen.'' — W. Bateson. 



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