how is the genetic material present in mitochondria maintained constant???

Question

geteimaterial wich ispresent in miochondria is maintained constant ?wats the mode of division in mitochondria?wats the main function of genetic materila present in mitocondria?

Answer 1

Mitochondria is replicated by duplication in eggs rather than recombination from mother and father. So it only comes from the mother. Mitochondria is the main way that metabolism energy is managed but a minute on Wikipedia would have told you that.

Answer 2

This is in contrast to most DNA of eukaryotic organisms, which is found in the nucleus. Nuclear and mtDNA are thought to be of separate evolutionary origin, with the mtDNA being derived from bacteria that were engulfed by early precursors of eukaryotic cells. Thus in cells in current organisms, the vast majority of proteins found in the mitochondria (~1500 in mammals) are encoded by nuclear DNA: some, if not most, are thought to have been originally of bacterial origin and have since been transferred to the nucleus during evolution.

In mammals, 100% of the mtDNA contribution to a zygote is inherited from the mother and this is true for most, but not all, organisms. Currently, human mtDNA is present at 100-10,000 copies per cell, with each circular molecule consisting of 16,569 base pairs with 37 genes, 13 proteins (polypeptides), 22 transfer RNA (tRNAs) and two ribosomal RNAs (rRNAs).

Unlike nuclear DNA in which the genes are rearranged significantly each generation (due to the process called recombination), there is usually no change in mtDNA from parent to offspring by this mechanism. Because of this and the fact that its mutation rate is higher than nuclear DNA and easily measured, mtDNA is a powerful tool for determining matrilineage, and has been used in this role for tracking many species back hundreds of generations.

hope this helps..

Answer 3

cytoskeleton=ribosomes+endoplasmic recticulum+golgi apparatus+vesicles+mitochondria+lysosomes+peroxisomes+centrosomes+cilia&flagella+microfil.&micotubes. The mitochr. has a two layer system. chemical reactions occur on first one. the matrix within the mitoch. controls & releases the chem reac. energy used by the body is turned into atp (adenosine triphosphate). mitoch has the shape of a kidney bean. it has a minimal amount of dna, it encodes stuff to make & new protein and special rna. proteins are synth & Transported too.