<prompt> Mitochondrial DNA mt- DNA is known for all except -Maternal inheritanceHeteroplasmyLeber hereditary optic neuropathy is the prototypeNemaline myopathy results due to mutations in mt- DNA  <response>: Ans. is d i.e., Nemaline myopathy results due to mutations in mt- DNA o Nemaline myopathy is not a mitochondria disorder. o Mitochondrial DNA is always maternally inherited. o Heteroplasmy is the presence of mixture of more than one type of an organelle genome mt- DNA within a cell or individual. It is a factor for the severity of mitochondrial disease, since every eukaryotic cell contains many hundreds of copies of mt- DNA; it is possible and indeed very frequent for mutations to affect only some of the copies, while the remaining ones are unaffected. 