plasmagene

noun Genetics.

1. a self-replicating genetic particle postulated to be in the cytoplasm of a cell, as in mitochondria.

noun

1. biology any gene other than those carried in the nucleus of a eukaryotic cell, such as a mitochondrial gene

n.

1. A self-replicating hereditary structure thought to exist in cytoplasm and function in a manner analogous to, but independent of, chromosomal genes.