The author of this book of memoirs, professor, Doctor of Biological Sciences, devoted her life to the study of the genetics of microorganisms. As a scientist, N.D. Lomovskaya is internationally famous. She gave presentations on her scientific work in many countries around the world at conferences and symposiums. Her numerous scientific articles have been published in many scientific journals around the world. The memoirs of N.D. Lomovskaya will be of undoubted interest both for the general reader and for scientists working in various fields of biology. These memoirs are evidence, often documented, of the life and work of representatives of the Russian scientific intelligentsia in the field of genetics. This book covers the historical period from the beginning of the twentieth century to the 1980s.