Insects Sexual reproduction

australian emperor laying egg, guarded male

insect species make more two-thirds of extant animal species. insect species reproduce sexually, though species facultatively parthenogenetic. many insects species have sexual dimorphism, while in others sexes identical. typically have 2 sexes males producing spermatozoa , females ova. ova develop eggs have covering called chorion, forms before internal fertilization. insects have diverse mating , reproductive strategies resulting in male depositing spermatophore within female, stores until ready egg fertilization. after fertilization, , formation of zygote, , varying degrees of development, in many species eggs deposited outside female; while in others, develop further within female , born live.