The Mitochondria in many cells, are believed to have been bacteria that have been incorporated in the cytophysiology. Mitochondria first off, contain their own DNA, er, RNA. Additionally physiologically the mitochondrion, has an inner membrane and some organelle traits similar to prokaryotic cells. Lastly Mitochondria are the only organelle capable of replicating itself. <span />
An allele is a variant of a gene. Each cell has two alleles (one per parent) for each gene: one dominant, one recessive. ... Locus is to some extent interchangeable with gene, though locus is less specific and doesn't imply that the location codes for an entire gene
