Extranuclear inheritance
Extranuclear inheritance
Extranuclear inheritance (pronounced: ex·tra·nu·cle·ar in·her·it·ance) is a form of genetic inheritance that occurs outside the nucleus of a cell. This type of inheritance is non-Mendelian and is passed on from the cytoplasm of the parent cell, often the mother, to the offspring.
Etymology
The term "extranuclear inheritance" is derived from the Latin words "extra" meaning outside, "nucleus" meaning kernel or core, and "inheritance" meaning to receive or obtain.
Mechanism
Extranuclear inheritance involves DNA found in organelles such as mitochondria and chloroplasts, which are located outside the nucleus of a cell. These organelles have their own DNA, separate from the nuclear DNA, and can replicate, transcribe, and translate this DNA independently.
Examples
One of the most well-known examples of extranuclear inheritance is mitochondrial inheritance, where the offspring inherits mitochondrial DNA only from the mother. Another example is chloroplast inheritance, which is common in plants.
Related Terms
- Genetic inheritance
- Nucleus
- Cytoplasm
- DNA
- Mitochondria
- Chloroplasts
- Mitochondrial inheritance
- Chloroplast inheritance
External links
- Medical encyclopedia article on Extranuclear inheritance
- Wikipedia's article - Extranuclear inheritance
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