Which chapter? In the first few pages of the book, Lennie was upset because George didn’t allow him to keep the dead rat, later on he was upset cuz he killed the pup and thinks George wouldn’t let him tend and play with the rabbit
Neither. Dormant and recessive are not synonyms because their definitions are not similar, nor are they antonyms because they aren't opposites, either. Dormant means to sleep. Recessive refers to a trait that is usually masked by a dominant trait.
Hope that answered your question.