As far as Chimpanzee gender ratio is concerned, there's really no "dominant" gender! Chimpanzee societies are fascinating in that they are matriarchal - That means female chimps hold the key positions within a given group; but that does not negate the existence and importance of males existing in the social hierarchy/structure, and both sexes play vital roles within their adult structures. So while you might say that females have a more significant impact on decision-making regarding communal concerns, they still depend on males just like they would --representing lifestyle across almost all animal behavior modeling situations. So, in essence one could safely respond to this query - it's a comprehensive and functional social structure where its members co-exist cooperatively with none attempting dominant or supreme hierarchy sans distinctions between genders when it comes to functionalities deemed essential for furtherance of diverse initiatives headstrong towards goals beneficial/cooperative for/to all without self-exclusions on basis of these distinctions/rankings rather than dominant status according to me