Stable legacy

* * * Similarity: Cytoplasmic gene is different from nuclear gene in molecular size and composition, but as a genetic material, it has many similarities with nuclear gene in structure and function: (1). They are all based on semi-conservative replication; ⑵. The expression mode is the same: DNA-mRAN ribosome-protein; ⑶. Mutation and inheritance can be stabilized, and the mutation factors are the same.

Differences: Cytoplasmic gene mutation frequency is high and directional mutation is strong; Different from reciprocal hybridization, genes are transmitted through female gametes; Gene localization is difficult; The carrier separation is irregular and the distribution between cells is uneven; Some genes are infectious, but the mutation frequency of nuclear genes is very small, so it is difficult to mutate directionally. Like mutual hybridization, genes are transmitted through male and female gametes; Genes can be located by hybridization; The carrier is regularly separated and evenly distributed among cells; Genes are not contagious.