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Initially the reproduction was a replicating process that consists in producing new individuals that contain the same genetic information as the original or parent individual.

This mode of reproduction is called asexual, and it is still used by many species, particularly unicellular, but it is also very common in multicellular organisms.

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Life has evolved from simple stages to more complex ones, and so have the reproduction mechanisms.Bacteria, for instance, reproduce asexually, but undergo a process by which a part of the genetic material of an individual (donor) is transferred to an other (recipient).Disregarding intermediates, the basic distinction between asexual and sexual reproduction is the way in which the genetic material is processed.the malaria parasite) also engage in sexual reproduction.Some bacteria use conjugation to transfer genetic material between cells; while not the same as sexual reproduction, this also results in the mixture of genetic traits.Conversely, there are also species in which there is no sexual specialization, and the same individuals both contain masculine and feminine reproductive organs, and they are called hermaphrodites. The reason for the evolution of sex, and the reason(s) it has survived to the present, are still matters of debate.

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