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Paternal mtDNA transmission
In genetics, paternal mtDNA transmission and paternal mtDNA inheritance refer to the incidence of mitochondrial DNA (mtDNA) being passed from a father to his offspring. Paternal mtDNA inheritance is observed in a small proportion of species; in general, mtDNA is passed unchanged from a mother to her offspring,〔The mtDNA is passed from mother to offspring unchanged except for the occasional genetic mutation, the rate of which is unknown but is sometimes estimated as once every 600 generations (see (Mitochondrial DNA Mutation Rates )).〕 making it an example of non-Mendelian inheritance. In contrast, mtDNA transmission from both parents occurs regularly in certain bivalves.
==In animals==
Paternal mtDNA inheritance in animals varies. For example, in Mytilidae mussels, paternal mtDNA "is transmitted through the sperm and establishes itself only in the male gonad."〔 〕〔(Male and Female Mitochondrial DNA Lineages in the Blue Mussel ''(Mytilus edulis)'' Species Group ) by Donald T. Stewart, Carlos Saavedra, Rebecca R. Stanwood, Amy 0. Ball, and Eleftherios Zouros〕 In testing 172 sheep, "The Mitochondrial DNA from three lambs in two half-sib families were found to show paternal inheritance." An instance of paternal leakage resulted in a study on chickens. There has been evidences that paternal leakage is an integral part of the inheritance of ''Drosophila simulans''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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