RJ
Tumblr
Themes
A Cultured Citizen
"To see a world in a grain of sand,
And a heaven in a wild flower,
Hold infinity in the palm of your hand,
And eternity in an hour."

-William Blake, Auguries of Innocence
897
Reblog

Posted
10 months ago
On 22 Jul '12
littlemicrobiologyblog: As many as 16 genes are believed to have a bearing on the colour of our eyes. The main two are OCA2 and HERC2. When a specific mutation occurs in the HERC2 gene it has an effect on the OCA2 gene, causing blue colouration of the eyes. This is because less melanin (brown pigment that is also responsible for tanning) is produced in the iris. If OCA2 is completely shut off by HERC2 then no melanin is produced in the eyes, a condition known as albinism. 

littlemicrobiologyblog:

As many as 16 genes are believed to have a bearing on the colour of our eyes.

The main two are OCA2 and HERC2. When a specific mutation occurs in the HERC2 gene it has an effect on the OCA2 gene, causing blue colouration of the eyes. This is because less melanin (brown pigment that is also responsible for tanning) is produced in the iris. If OCA2 is completely shut off by HERC2 then no melanin is produced in the eyes, a condition known as albinism. 

  1. things-that-make-p-3a-happy reblogged this from medicalschool
  2. a-piece-of-happiness reblogged this from littlemicrobiologyblog
  3. ninearmedoctopus50b reblogged this from littlemicrobiologyblog
  4. belgiumgiraffes reblogged this from medicalschool
  5. mythsandapparitions reblogged this from littlemicrobiologyblog
  6. descendingchimeras reblogged this from littlemicrobiologyblog
  7. alish90ma07 reblogged this from littlemicrobiologyblog
  8. hannahrawrrr reblogged this from littlemicrobiologyblog
  9. moo2a reblogged this from littlemicrobiologyblog
  10. amylorene reblogged this from littlemicrobiologyblog
  11. mssupertaytay reblogged this from littlemicrobiologyblog
  12. smiles2998 reblogged this from jomeo18
  13. greenchicklet reblogged this from littlemicrobiologyblog
  14. jomeo18 reblogged this from littlemicrobiologyblog
  15. carlson157 reblogged this from littlemicrobiologyblog
  16. cbbrown70 reblogged this from littlemicrobiologyblog
  17. hwikim reblogged this from littlemicrobiologyblog
  18. sneezy101 reblogged this from littlemicrobiologyblog
  19. theshielddoctor reblogged this from medicalschool
  20. just-another-mysterious-kid reblogged this from medicalschool
  21. fell-down-the-rabbithol reblogged this from medicalschool
  22. insomnia-princess reblogged this from rimrider
  23. rimrider reblogged this from medicalschool
  24. melnubcake reblogged this from medicalschool
  25. truthhurtskeepit100 reblogged this from medicalschool
  26. i-love-rainbow-scarves reblogged this from medicalschool
  27. welaughandplay reblogged this from medicalschool
  28. fidhahdido reblogged this from medicalschool
  29. strangeandfascination reblogged this from captainbrax
  30. thelasttruegentleman reblogged this from erickchance
  31. erickchance reblogged this from medicalschool and added:
    As many as 16 genes are believed to have a bearing on the colour of our eyes. The main two are OCA2 and HERC2. When a...
  32. jacobjackpot reblogged this from medicalschool
  33. theartofslack reblogged this from medicalschool