Y-chromosomal Adam

In human genetics, Y-chromosomal Adam (Y-MRCA) is the most recent common ancestor (MRCA) from whom all living people are descended patrilineally (tracing back only along the paternal lines of their family tree). Recent studies report that Y-chromosomal Adam lived as early as around 142,000 years ago. Older studies estimated Y-MRCA as recent as 60,000 years ago. All living humans are also descended matrilineally from Mitochondrial Eve who is thought to have lived earlier, about 190,000–200,000 years ago. Y-chromosomal Adam and Mitochondrial Eve need not have lived at the same time.