RECOMBINATION IN SEXUAL ORGANISMS 



67 



FIGURE 3.2. Diagram of the life cycle and the segregation of color in the red bread 

 mold Neurospora crassa. It is a peculiarity of Neurospora that there are eight 

 spores; the zygotes of other organisms usually produce four gametes each. The eight 

 spores of Neurospora are almost invariably four pairs of identical sisters. 



