Ana amfani da kalmar “homosporous” a ilmin halitta don bayyana tsiron da ke samar da nau’in spore guda ɗaya kawai, wanda zai iya zama gametophyte na bisexual (wani tsiro mai gabobin haihuwa na maza da mata). Kalmar "homosporous" ta samo asali ne daga kalmomin Helenanci "homo" ma'ana "daya" da "sporous" ma'ana "spore."A cikin tsire-tsire masu ɗanɗano, spores yawanci ƙanana ne kuma kama da girma da siffar. Lokacin da spores suka tsiro, suna haifar da gametophyte wanda ke samar da gates na maza da mata. Irin wannan haifuwa ya zama ruwan dare a cikin shuke-shuke na farko kamar mosses, ferns, da wasu lycophytes. haifar da gametophytes maza da mata bi da bi.