Africans Have The Oldest DNA
Two pieces of the human genome have proved useful in deciphering human history: mitochondrial DNA and the Y chromosome. These are the only two parts of the genome that are not shuffled about by the evolutionary mechanisms that generate diversity with each generation. Instead, these elements are passed down intact.
According to the “Out of Africa” hypothesis, all people alive today have inherited the same mitochondria from a woman who lived in Africa about 160,000 years ago. She has been named Mitochondrial Eve. All men living today have inherited their Y chromosomes from a man who lived 140,000–500,000 years ago, probably in Africa. This man is known as the Y-chromosomal Adam.
