masculinization, hermaphroditism, prairie vole, dimorphism, gonadal, hindbrain, meadow vole, lordosis, ciliates, oviposition, swordtails, ovipositor, oviducts, conceptus, mesenchyme, assortative mating, intraspecific, pelvic girdle, oestrus, caudal, estrous, antennal, introgression, eyespots, striated muscle, flatworm, radula, mating, trigeminal, ontogeny, microelectrode, fossa, motile, planaria, osteoclast, morphogen, osteoblast, hind limb, papilla, baculum, mandibular, inguinal canal, masculinisation, fru, asexual reproduction, syrinx, pineal, epistasis, depolarizing, ciliary, xenopus laevis, neoteny, mosaicism, pelvic fin, mandrill, trophoblast, sociality, metazoans, osculation, tumescence, morphogenesis, tubule, palps, corpus luteum, glans penis, xenopus, epididymis, pheromones, flatfishes, spermatozoa, erectile tissue, paramecia, biogenesis, protozoan, tarsal, annelid, laterality, somites, nephron, efferent, ostia, masticatory, mole rat, ganglion, sticklebacks, estrous cycle, forelimb, spermatic cord, occiput, mouthparts, ectoderm, homologous chromosomes, platypuses, keratins, hyperphagia, multicellularity, peroxisome, umbilical vein, fiddler crab, manakin, chordates, crinoid, locomotory, coital, contractile, ejaculatory, manipulatory, reproductive, excretory, ritualized, adjustive, masturbatory, prehensile, repetitive, agonistic, articulatory, cephalic, genital, penial, phonatory, routinized

ascaphus trui, bell toad, ribbed toad, tailed frog, tailed toad