Mace (alama ce: ♀), wadda ta kasance jinsin kwayar halitta, ko kuma a ce wani sashi na kwayar halitta, wacce ke samar da kwayar halittar da ba ta hannu ba (kwayayen kwai). Haramtawa yanayin rashin lafiya, mafi yawan dabbobi masu shayarwa, gami da mutane mata, suna da chromosomes guda biyu. Halayen mata sun banbanta tsakanin jinsuna daban-daban tare da wasu nau'in da ke dauke da cikakkun siffofin halayyar mata, kamar kasancewar gagarar mammary . Babu wani guda kwayoyin inji bayan jima'i da bambance-bambance a cikin jinsuna daban da kuma zama na biyu mata da maza alama sun samo asali mahara sau da kansa a cikin daban-daban juyin dangoginsu . Kalmar mace dai ta fito ne daga Latin femella, sifar mace, ma'ana " mace "; bashi da alaƙa da kalmar namiji . Mace kuma za a iya amfani da su koma zuwa jinsi . Mãtan nuna ova, da ya fi girma gametes a heterogamous haifuwa tsarin, yayin da karami da kuma yawanci motile gamete, da spermatozoon, an samar da namiji .