Levites (or Levi) (/ ˈ l iː v aɪ t /, Hebrew: לְוִיִּם ‎ Lǝvīyyīm) are Jewish males who claim patrilineal descent from the Tribe of Levi. The Tribe of Levi descended from Levi, the third son of Jacob and Leah.The surname Halevi, which consists of the Hebrew definite article "ה ‎" Ha-("the") plus Levi (Levite) is not conclusive regarding being a Levite; a titular use of HaLevi indicates being a …

Analysis of Y-chromosome have found that the Libyan population is characterized by the high frequency of haplogroup J1-M267 (39.5%) and haplogroup E-M81 (33.7%). [33] Listed here are the human Y-chromosome DNA haplogroups in Libya.

ハプログループD-M55 (Y染色体)（ハプログループD-M55 (Yせんしょくたい)、英: Haplogroup D-M55 (Y chromosome) ）とは、分子人類学で用いられる、人類のY染色体ハプログループ（単倍群）の分類のうち、ハプログループDのサブクレード（細分岐）の一つで、「M55」 の子孫の系統である。 3.5-4万年ほど前に日本列島で誕生したと考えられ、現在日本人の3割ないし4割 …

The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation that emerges later in the adult. Prenatal hormones may be seen as the primary determinant of adult sexual orientation, or a co-factor with genes, biological factors and/or environmental and social conditions.