Birgid Schlindwein's

Hypermedia Glossary Of Genetic Terms

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Mitochondria Granular, rod-shaped, or filamentous self-replicating organellae in cytoplasm. Consist of an outer and inner membrane and function in cell respiration and nutrition. They have their own DNA (mtDNA) and ribosomes and are mostly maternally inherited.
Related Terms:
Cytoplasm The matrix of a cell that contains the ribosomes, the cytoskeleton and different aggregates of storage compounds. Nucleus, cytoplasm, plastids, mitochondria and membrane form the cell.
mitochondrial DNA (mtDNA) Circular or linear DNA of the mitochondria. It codes for only a small but essential part of the mitochondrial proteins and for genes for tRNAs and rRNAs. In animals and yeast every species has a uniform type, in plants it varies even within one cell.
Ribosome The term proposed by Roberts (1958)for the small cellular components (Gk. soma, body) composed of specialized ribosomal RNA and protein (ribonucleoprotein); site of protein synthesis. Plastids and mitochondria have their own ribosomes (plasto- and mitoribosomes)
Maternal inheritance Inheritance pattern displayed by mitochondrial genes that are propagated from one generation to the next through the mothers; the mitochondria of the zygote come almost entirely from the ovum.

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Programming: Herbert Maier
Database: Birgid Schlindwein. Please contact me if you encounter any mistakes or if you are missing anything
© Dr. Birgid B. Schlindwein
last update of the database 10/01/2006