The Issei , Nisei and Sansei generations reflect distinctly different attitudes to authority , gender , non-Japanese involvement , and religious belief and practice , and other matters .
The Issei , Nisei and Sansei generations reflect distinctly different attitudes to authority , gender , non-Japanese involvement , and religious practice , and other matters .
Epigenetics , the study of changes in genetic expression in response to environmental factors which do not alter the underlying DNA , may also play a role in determining suicide risk .