Answer: mtDNA requires a much smaller sample than nuclear DNA.
mtDNA is useful if the nuclear DNA is degraded.
mtDNA is present in all maternal relatives of the person being investigated.
Mitochondrial DNA is a type of DNA that is inherited from the mother therefore, it can be found nearly similar in DNA typing of all maternal relatives. It provides valuable locus for forensic DNA typing. The chances and amount of recovery of mitochondrial DNA from the biological samples obtain from the scene of crime is greater than nuclear DNA. It can be obtained from the extremely small amount of biological samples.
Sentences 1, 2 and 4 are the benefits of using mitochondrial DNA over nuclear DNA.
Mitochondrial DNA (mtDNA) is a small chromosomal material found in the mitochondria of the cell and is passed from the mother to the progenies.
Mitochondrial DNA is found in large numbers in the cells and requires less sample size compared to nuclear DNA as they are present in large quantities.
Nuclear DNA can get degenerated quickly compared to mt DNA because of the reactive oxygen species(ROS).
mtDNA is passed from the mother to the offspring and hence the mtDNA is present and is similar in the maternal relatives of the person being examined.
Therefore, options 1, 2 and 4 are correct.
Learn more about mitochondrial DNA here:
https://brainly.com/question/17497340
