SEXUAL REPRODUCTION IN HOUSE FLY: In house fly separate male and female organisms are present.
Male reproduction system: Male reproductive system consist of three parts.Testis, Vas deference, Ejaculatory duct.In male fly there are a pair of testis in the abdomen, they are present one on each side of the ventral nerve cord.Testes produce sperms.Each testis connected to a tube called vasdeferenses, which are collect sperm from testis.Two vas deferens are joined to form single ejaculatory duct.
Female reproduction system:Female reproductive system consists of Ovaries, Oviduct and Female genital aperture.A pair of ovaries present in abdomen which produce ova.Each ovary connected to a duct called oviduct. Which collect ova from ovaries.Oviducts open outside the body through the female genital aperture.A sac like structure called spermathecaecollect, which are store sperms from male fly during copulation.A special organ called Ovipositor helps to laying fertilized eggs.
Fertilisation:During copulation male fly deposits sperms in to the body of the female , which are stored in spermatheacae until ova are released by the ovary.Fertilisation occurs inside the body of female called internal fertilisation.Fertilised eggs are laid several batches 5 to 6 batches, each batch will consist of 100 to 125 egg safter only one successful copulation in a cluster of decaying organic matter like manure.cowdung, decomposing fruits and human faeces.

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