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Acknowledgements
First of all, I would like to express my deepest gratitude for my supervisor, Professor Hiroyuki
Takeda, and my mentor (or trainer), Dr. Ryohei Nakamura, for providing me with the
opportunity to study in a splendid environment. They allowed me to proceed my challenging
Ph.D. project as I want to do and brought me irreplaceable experiences. I owe my completion
of my Ph.D. course to their substantial supports, encouragement, and patients.
I would like to express my gratitude to Dr. Tetsuji Kakutani for helpful discussion
about epigenetic inheritance among diverse species and giving me insightful comments.
Without his help, I would not have achieved to obtain Ph.D.
I would like to acknowledge all the lab members for everyday discussions and for
their continuous supports. Especially, I am grateful to lab alumni, Dr. Yasuko Isoe, Dr. Napo
K. M. Cheung and Dr. Kota Abe. They taught me a lot, through daily communications, about
very basic but important things which I should know to achieve Ph.D. and to be a good
scientist.
In addition, I would like to thank all my friends in Department of Biological Sciences
for encouraging me when I faced difficulties and for giving me constructive comments and
suggestions.
I would like to offer my special thanks to Jean-Baptiste Lamarck and Paul Kammerer.
Their classical but intriguing ideas and experiments motivated me and took me into this field
of epigenetics and inheritance. Without their previous contributions to science, I would never
know such a fascinating world.
Finally, I owe my gratitude to my family. They believed in me and encouraged me all
the time. I would like to dedicate this doctoral thesis to them.
62
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