No. 609] THE THKOnV OF THE GENE 



537 



so far as it lia> proiitcsx'd, understood. Do not under- 

 stand me to say tliat 1 think all the problems of heredity 

 have been solved, even with the acceptance of the chromo- 

 somal mechanism as the agent of transmission.^ In fact, 

 I think that we are only at the beginning even of this 

 study, for the important work of McClung, Wenrich, Miss 

 Carothers and Kohert^on show^ that there are pro! ally 



many ^urpri^e.^ in >t(.u' t'oi- u- concerning wodt's of dis- 

 trihutiou of Mendeliait faciei ^. Moreover, the method by 

 which crossing ()v<m- of ailciiMiiorpliic factor^ take- ]->lace 

 i< still in the ^]H-cn!atiNc Mauc. far a- the cxtoh)a-ical 

 evidence i- c..,n -m ned. m,. M.an> .p'cMion- a- t.) 



how the liiM a l\ a, laii-ed hirioi ^ h.-M th«':i' -hKm" diirinu 

 the iv-^tiiiu Man.- ol the i.uc'.mi^ and duiiiiu the condenM>d 



