Attitude expression (and its opposite, DK response rate) is an important personal and political characteristic which is related to an individual's psychological and demographic traits. It is also transmitted from parent to child. In fact, it is transmitted to a greater degree than other political attitudes examined here, with the exception of partisanship. Owing to the fact that males show higher levels of attitude expression, and because this tendency is reinforced by cultural norms, the transmission process for attitude expression is conditioned by the sex of child and of parent. Compared with the father's impact, mothers are particularly influential in transmitting attitude expression to daughters. While fathers have a somewhat stronger effect on sons than do mothers, the difference is substantially smaller.