One difficulty in extracting sequencing reads that correspond tomitochondrial DNA from mixed fragments of nuclear and mitochondrialDNA is the nuclear genome contains segments homologous to regionsof the mitochondrial genome called \"numts.\" Mammalian genomescontain 50-450 kb of numts (the human genome contains 1005 numts,averaging 446 bp).
Estimate the fraction of reads from fragments of mammoth DNAthat are likely to be numts. The mammoth genome is approximately4.7x10^9 bases in length.
