Addis Ethiopia Weblog

Ethiopia's World / የኢትዮጵያ ዓለም

  • May 2012
    M T W T F S S
  • Archives

  • Categories

  • Recent Posts

Why Do ‘Black’ Pacific Populations of Melanesia Have Blond Hair?

Posted by addisethiopia / አዲስ ኢትዮጵያ on May 6, 2012

Blond hair is relatively common in the Solomon Islands, even though the skin pigmentation of Melanesian peoples is relatively dark.

Naturally blond hair is rare in humans and found almost exclusively in Europe and Oceania. Here, we identify an arginine-to-cysteine change at a highly conserved residue in tyrosinase-related protein 1 (TYRP1) as a major determinant of blond hair in Solomon Islanders. This missense mutation is predicted to affect catalytic activity of TYRP1 and causes blond hair through a recessive mode of inheritance. The mutation is at a frequency of 26% in the Solomon Islands, is absent outside of Oceania, represents a strong common genetic effect on a complex human phenotype, and highlights the importance of examining genetic associations worldwide.

Continue reading…


Interesting reading..


2 Responses to “Why Do ‘Black’ Pacific Populations of Melanesia Have Blond Hair?”

  1. Liposarcoma commonly appears being a slowly enlarging, painless,
    nonulcerated submucosal mass in the middle-aged man or woman.

    Cortisone injections directly in to the spinal column (called `epidural’, due to the fact they are injected beneath the dura, and that is the thin layer of membrane around the spinal cord) may well be applied to provide short-term discomfort relief, although long-term utilization of steroids will not be recommended.

  2. Vijaya said

    Actually this mutation is not absent outside of oceana. We have this mutation in both India and Sri Lanka.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: