LUTHER BURBANK 



phenomena of "dominance" and "recessiveness" - 

 in a word, that heredity is a somewhat larger term 

 than Mendelism, and that the biologist or botanist 

 or plant developer who would gain a really clear 

 conception of the situation must clearly distinguish 

 between the lesser term and the greater, although 

 at the same time recognizing that one is an essen- 

 tial sub-structure of the other. 



So Darwinian heredity, which recognizes the 

 heritability of whole coteries of characters that are 

 too profoundly fixed to Mendelize, is again receiv- 

 ing recognition; and the multitude of special 

 studies of the past decade that were inspired by 

 the rediscovery of Mendel's work and by the ex- 

 ploitation of his formula will take their place as 

 interesting additions to the minutia of the scheme 

 of heredity, without being supposed by any one, 

 except here and there a victim of mental strabis- 

 mus, to represent the full measure of the great 

 mysteries of inheritance. 



We have had occasion in successive chapters to 

 present again and again illustrations of the type of 

 hereditary transmission that lends itself to classi- 

 fication under the Mendelian notation. We shall 

 catch further glimpses of.it before we are through. 

 Here it seems worth while, in connection with the 

 story of the hybrid walnuts, to attempt a more 

 comprehensive view of the entire field of heredity, 



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