What is genomic and non genomic DNA? does non genomic DNA occurs?
Answers:
Genomic DNA in eukaryotes (higher plants and animals containing a true nucleus) generally refers to DNA contained in chromosomes contained in the nucleus. The complement of nuclear chromosomes is called the genome.
Non genomic DNA is anything else. An example of this in eukaryotes is mitochondrial DNA or potentially viral DNA from a viral infection
In prokaryotes (bacteria) genomic DNA is contained in one large circular strand. Non genomic DNA occurs as small circular strands known as plasmids.
what
Genome: the complete sequence of DNA in a eukaryotic nucleus.
However, the nucleus is not the only location of DNA - there is DNA in mitochondria too. So sometimes the descriptions 'mitichondrial genome' and 'nuclear genome' are used to distinguish between them. Alternatively, genomic DNA is the term used to describe only the DNA which encodes an organisms genetic information (and is confined to the nucleus of eukaryotes).
Don't forget that there is complementary DNA (cDNA) as well. This is the product of copying RNA using reverse transcriptase.
Genomic DNA is the one inside the nucleous, non genomic DNA is the one inside mitochondria or chloroplast (in plants). Genomic DNA is the responsible of herence, both mother and father recombine their DNA to form an individual with a specific genomic DNa but the non genomic DNA in the mitochondria inside the ovule of the mother also transmits some information so the individual also contains this information from the mother, the mitochondrial DNA of the father is lost because the tail of the sperm is degradated after fertilization.
in prokaryotes like bacteria non genomic DNA is the one in plasmids this are small quantities of DNA outside the "nuclear" area.
Genomic DNA is the one contained in the chromosome, in the case of bacteria, or in the chromosomes in the nucleus, like in eukaryotes. Non genomic DNA is DNA contained in mitochondria and chloroplasts, and is transmitted directly from mother to sons, so yours is identical to your mother's.
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