YEAST GENETICS : Life Cycles, Cytology, Hybridization, Vitamin Synthesis, and Adaptive Enzymes.

I. Life cycles............................. .111 II. Mating types............................ 121 III. Hybridization............................ 125 IV. Cultural variability and stability............................. 128 V. Spores and sporulation............................ . 131 VI. Speciation in yeasts............................. 133 VII. Cytology............................. 136 VIII. Budding............................ 142 IX. Structure of the colony............................. 143 X. Dormancy............................. 145 XI. Vitamin synthesis............................. 152 XII. Adaptation............................. 155 XIII. References............................. 166