Kiddushin 36 - Mitzvot From Which Women are Exempt

Although a Jewish man is not allowed to make a bald spot "between the eyes" and anywhere on the head as a sign of mourning for the dead, a Jewish woman may. This is derived by comparison with the tefillin, which are worn "between the eyes" and which women are not obligated to wear.
Most elements of the priestly service in the Temple apply to men who are Kohanim but not to women who are daughters of Kohanim, because of "speak to the sons of Aharon" - and not to the daughters of Aharon.