35 



ynous receptive elements. As a matter of fact, only one of these 

 outgrowths is the trichogyne end of the ascogonium which is 

 concealed within the incipient perithecium. That a transfer of 

 nuclei from the conidia does take place can be readily demon- 

 strated. Whenever an albino race of one sex is fertilized by ap- 

 plying the orange-colored conidia of the opposite sex from a nor- 

 mal race, half of the progeny ascospores that result are al- 

 binistic, and the other half contain factors for the production 

 of orange-colored conidia. The segregation of the factors for sex 

 and the factors for conidia takes place according to Mendel's 

 laws. 



Figure 3. The same seven receptive bodies shown in figure 2, twenty-two 

 hours later, photographed at a higher focus but with the same magnification. 

 Bodies a, b, and c, as seen by their larger size, were successfully fertilized. The 

 others, not being fertilized, made no further growth, and being smaller, they 

 are necessarily out of focus in the picture. 



Any mycelium of the bakery mold under favorable condi- 

 tions can be made to produce minute spermatium-like micro- 

 conidia (microspores). It has been assumed that these micro- 

 conidia are male organs, constitutionally different from the 

 orange-colored monilioid conidia borne on the same mycelium. 



