possibilities the individual will have a blue eye color
caused by the deficiency of melanin pigment (Starr,
2013).
Now let’s consider two blue eyed parents. One has a
normally functioning HERC2 gene and mutated OCA2
gene where the other one has a mutated HERC2
gene but a normally functioning OCA2 gene. When
producing an offspring if the healthy HERC2 gene is
inherited from first parent and healthy OCA2 gene
from the second one, the new individual will have
both HERC2 and OCA2 genes well-functioning and
will be able to synthesize melanin pigment which will
make him have brown eye color (Starr, 2013).
Nature has many exceptions which we have difficulty
in explaining with our current science knowledge.
As long as the humans are on the earth, neither the
questions nor the developments made in order to find
answers will ever end.
BIOLOGY
DEPARTMENT
Bibliography:
Allott, A., & Midroff , D. (2014). IB Diploma
Programme Biology. Oxford.
MacDonald, F. (2014, December 20). This Is How
Blue Eyes Get Their Colour. Retrieved May 6, 2017,
from Science Alert: https://www.sciencealert.com/
this-is-how-blue-eyes-get-their-colour
Starr, B. (2013). How Blue Eyed Parents Can Have
Brown Eyed Children. Retrieved May 6, 2017, from
The Tech: http://genetics.thetech.org/how-blueeyed-parents-can-have-brown-eyed-children
Gökçen Nilay NAKTİYOK
11-A
THE CLAPPER 2016 - 2017 61