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LECTURES ON BIOLOGY 



Iii my opinion the conclusion at which Mendel arrived on the 

 basis of his facts is a simple and natural straightening of all the 

 tangled skeins. Only when we assume that the two ' rudiments ' 

 of the paternal organisms which fused during fertilization in the 

 ovum to one pair, once more separate during the formation of 



FIG. 74. MENDEL'S LAW. 



(1 and 2) Germ-cells of the parents. (3) Their union in the fertilization-act ; 

 also diagram of the structure of the body-cells of the first hybrid-generation. (4-6) 

 Germ-cell formation of the hybrids. The germ-cells formed are ' pure.' (7 to 10) 

 Fertilization-process during continuation of the breeding ; the four possibilities. 



the germ-cells of the hybrids, so that one half of the sex-cells 

 receives the ' rudiments ' of the paternal character, but the 

 other that of the mother, we can gain a proper perception of 

 the cause of this remarkable phenomenon. The germ-cells of the 



