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Do mitochondria have genes?

Do mitochondria have genes? - Biology Forum

Do mitochondria have genes? - Biology Forums. Ask questions and discuss the study of Biology. If you have Biology questions from your homework ask them here!


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Old 06-28-2009, 02:18 AM
Pipette Filler
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Default Do mitochondria have genes?



Plant and animal cells (few exceptions, red blood cells for example) have a nucleus which contains chromosomes, genes, and DNA among other things. Mitochondria contain DNA, but are there genes as in nucleus-containing cells or is it distributed in some other manner?

If there are genes in the mitochondria are there different genders of mitochondria?
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Old 06-28-2009, 02:18 AM
Pipette Filler
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I'm not entirely sure but if there is DNA it's safe to say there are genes right?
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Old 05-11-2010, 08:29 AM
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Default Re: Do mitochondria have genes?

The circular mitochondrial DNA encodes 13 of the subunits of the electron transport chain. Thus, it contains genes. Also, it produces the mitochondrial "in-house" translation and replication machineries (rRNAs, tRNAs etc). However, normally, when transcribing the mtDNA, it's done as a whole group of genes that are later spliced to generate individual mRNAs for ribosomal translation.
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Old 05-11-2010, 09:16 AM
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Default Re: Do mitochondria have genes?

Not only mitochondria have genes, but also the mitochondrial DNA is highly sought by evolution biologists since accumulates more genetic mutations in the course of ages.
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Old 06-15-2010, 05:40 PM
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Default Re: Do mitochondria have genes?

Yes, mitochondria have DNA encoding a number of genes not present in nuclear DNA. Cells cannot create mitochondria "from scratch;" they must be inherited from the mother cell. It is thought that mitochondria originated as bacteria endocytosed by larger cells which lived in symbiosis with the larger cells (look up the endosymbiotic theory).
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