Final answer:
Genji likely experienced fear when his arms were restrained during the research study. Melancholy is not one of the seven universal emotions, which are fear, disgust, contempt, and others.
Step-by-step explanation:
If Genji participated in a research study as an infant where his arms were restrained, the likely emotion he experienced would be fear. When infants are restrained, they often experience a loss of control and may perceive the situation as threatening, which can induce fear. On the other hand, when discussing the seven universal emotions described in the chapter, which include happiness, sadness, fear, disgust, anger, surprise, and contempt, melancholy is not listed as one of them.