Genetic characteristics 1. Semi-independent 2. Non-universality of the genetic code 3. Matrilinealinheritance 4. Replicative segregation 5. Threshold value 6. High mutation rate4. Replicative segregation 1. Semi-independent 2. Non-universality of the genetic code 3. Matrilineal inheritance 5. Threshold value 6. High mutation rate Genetic Characteristics