334 THE THEORY OF THE GENE 



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Jeffrey, E. C. 1925. Polyploidy and the origin of species. Am. Nat. LIX. 

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1918. Disproof of a certain type of theories of crossing over between 



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1923. Crossing over and the theory that the genes are arranged in 



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Jones, D. F. 1917. Dominance of linked factors as a means of accounting for 



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XXXVI. 

 Kahle, W. 1908. Paedogenesis bei Cecidomyiden. Zoologica. Leipzig. LVIII. 

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1927. The production of polyploid gametes in hybrids. Hereditas, IX. 



Kihara, H. 193 9. iJber cytologische Studien bei einigen Getreidearten. I. II. 



Chromosomenzahlen und Verwandtschaftsverhaltnisse unter Avena-Arten. 



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1921. Uber cytologische Studien bei einigen Getreidearten. Ibid. 



XXXV. 



1924. Cytologische und genetische Studien bei wichtigen Getreidearten 



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Kihara, H., and Ono, T. 1923. Cytological studies on Rumex L. I. Chromo- 

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1923. Cytological studies on Rumex L. II. On the relation of chromo- 

 some number and sexes in Rumex acetosa L, Ibid. XXXVII. 



