Mitochondrial DNA can be used as evidence for human evolution. Explain why mitochondrial DNA is used rather than nuclear DNA

The first reason why mitochondrial DNA is better than using nuclear DNA is because it is in a higher abundance than nuclear DNA. Furthermore, mitochondrial DNA is more stable over time and less susceptible to decay, unlike nuclear DNA. Mitochondrial DNA also has a high mutation rate which means it can be used to show evidence of human evolution. Mitochondrial DNA is also used rather than nuclear DNA as it shows the inheritance down the female line - providing a map for evolutionary changes. Additionally, it is also easier to extract mitochondrial DNA than nuclear DNA. Also, because no recombination occurs in mitochondrial DNA, it shows a pattern of maternal inheritance as it is all passed down from the mother and therefore much rather used than nuclear DNA.

RP

Related Biology GCSE answers

All answers ▸

Photosynthesis occurs in the guard cells but not the epidermal cells. Explain why this is important in the control of the rate of transpiration in the plant


Why does our heart rate increase when we run compared to when we are sitting?


Does water travel up or down the concentration gradient?


What happens prior to and during mitosis?