Similar to the dynamics of racism. Males are believed to be superior to females and when this belief is put into action it leads to females being treated as objects, the last to be hired, first to be fired, being paid less for equal work.
Sexism is gender prejudice, usually directed at women. Often this form of prejudice is combined with institutional power to create and maintain a system of privileges and benefits for males. See: Prejudice
Sexism stems from a set of implicit or explicit or implicit beliefs, erroneous assumptions and actions based upon an ideology of inherent superiority of one gender over another and is evident within organizational or institutional structures and programs as well as within individual thought or behavior patterns. Sexism, like racism, is a discriminatory act backed by power. Sexism is any act or institutional practice, backed by institutional power which subordinates people because of gender. While, in principle, sexism may be practiced by either gender, most of our societal institutions are still the domain of men and usually, the impact of sexism is experienced by women. Sexism is also any action by an individual (usually male) supported by the threat of physical power which seeks to subordinate another individual (usually female).
Sexism is commonly considered to be discrimination and/or hatred against people based on their sex rather than their individual merits, but can also refer to any and all systemic differentiations based on the sex of the individuals.