In: Biology
C. The circular chromosome-based genome of mitochondria in plant and animal cells, termed mitochondrial DNA or mtDNA, are quite distinct to one another in terms of their overall size, structure, sequence composition and genetic content. Detail these differences.
Parameter | Nuclear DNA | Mitochondrial DNA |
1. Location | It is present in the Nucleus | It is present in the mitochondria |
2. Histones | Present | Absent |
3. Genes | Nuclear DNA is made up of 20,000 of genes | Mitochondrial DNA is made up of 37 genes |
4. Inherited from | Mother and Father | Only mother |
5. Function | Genetic information, Transcription and Translation | Respiration |
6. Size | It consists of 3.2 billion base pairs | It consists of 16, 569 base pairs |
7. Structure | It is linear | It is circular |
8. Sequence composition and genetic content | It has 23 pairs in each cell and are diploid in nature. It is monocistroninc | It has no paired chromosomes with haploid. It is polycistronic |
9. Introns | It has introns | It has no introns |
10. Repari and Proof reading | It has repair and proof reading mechanisms | It has no repair or proof reading mechanisms |
11. Recombination | It is varied by recombination | It has no recombination |
12. Mutation rate | It has low mutation rate | It has high mutation rate |