In 1979, bones found outside Ekaterinburg, Russia, were shown to be those of Tsa
ID: 145466 • Letter: I
Question
In 1979, bones found outside Ekaterinburg, Russia, were shown to be those of Tsar Nicholas and his family, who were executed in 1918 by a Bolshevik firing squad in the Russian Revolution. To prove that the skeletons were those of the royal family, mtDNA was extracted from the bone samples, amplified by PCR and compared with mtDNA from living relatives of the tsar's family. Why was DNA from the mitochondria analyzed instead of nuclear DNA? Select all that apply. Mitochondrial DNA is inherited from both parents Mitochondrial DNA does not undergo recombination. Mitochondrial genomes are present in multiple copies in the cells. Mitcohondrial DNA is circular and is more stable over time. From which lving relatives would mitochondrial DNA provide useful information for verifying that the skeletons were those of the royal family? O o The mtDNA from the tsar's living relatives of both paternal and maternal descent should be analyzed. The mtDNAtom the tsar's living relatives of patermal descent should be analyzed.Explanation / Answer
1. Mitochondrial DNA does not undergo recombination.
Genomes are present in multiple copies in the cells
It is circular and more Stable over time
Reason- It can be inherited from mother as ovum provide us with the mitochondria.
It is present in multiple copies and it fuses and hence becomes more stable than nuclear than DNA.
2. Mitochondrial DNA from the tsar's living relatives of maternal descent should be analyzed.
As mitochondria are provided by the mother.