In human genetics

Human genetics

Human genetics describes the study of inheritance as it occurs in human beings. Human genetics encompasses a variety of overlapping fields including: classical genetics, cytogenetics, molecular genetics, biochemical genetics, genomics, population genetics, developmental genetics, clinical genetics,...

, Haplogroup J (previously known as HG9 or Eu9/Eu10

Conversion table for Y chromosome haplogroups

Y chromosome haplogroups are a frequent topic of discussion in human population genetics and genetic genealogy. Men in the same Y DNA haplogroup share a set of differences, or markers, on their Y chromosome, which distinguish them from men in other haplogroups. Often these UEPs, or markers used to...

) is a Y-chromosome DNA haplogroup. It is one of the major male lines of all living men. It is divided into two main branches referred to as J1

Haplogroup J1 (Y-DNA)

In human genetics, Y DNA haplogroup J1, also known as J-M267, is a sub-haplogroup of Y DNA haplogroup J, along with its sibling clade Y DNA haplogroup J2. Men with this type of Y DNA share a common paternal ancestry, which is demonstrated and defined by the presence of the SNP mutation referred to...

 and J2

Haplogroup J2 (Y-DNA)

In human genetics, Haplogroup J2 is a Y-chromosome haplogroup which is a subdivision of haplogroup J. It is further divided into two complementary clades, J2a-M410 and J2b-M12.-Origins:...

.
Haplogroup J is believed to have arisen roughly 30,000 years ago in Southwest Asia

Southwest Asia

Western Asia, West Asia, Southwest Asia or Southwestern Asia are terms that describe the westernmost portion of Asia. The terms are partly coterminous with the Middle East, which describes a geographical position in relation to Western Europe rather than its location within Asia...

 (Arabia Felix) (31,700±12,800 years ago according to Semino et al.. 2004). It is most closely related to Haplogroup I

Haplogroup I (Y-DNA)

In human genetics, Haplogroup I is a Y-chromosome DNA haplogroup, a subgroup of haplogroup IJ, itself a derivative of Haplogroup IJK....

, as both Haplogroup I and Haplogroup J have mutations in common deriving from Haplogroup IJ (S2, S22).