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Today, researching on simple hereditary factors and genetic
differentiations according to gene pool is one of the most significant scientific discussions in the world of biology. Among these research topics and issues, one may find color blindness, due to its gene being
found in the human chromosome X, very interesting and important.
According to the Post's and Pickford's theories, the frequency of this disease among various world populations is quite different and it also depends on their ways of life. In this research, this phenomenon
among 1008 samples in six groups of the Iranians, i.e. Yamoot, Gooklan,
Tekeh, Qazzaq, Talesh and Zoroastrian have been surveyed. Then, the research findings have been compared with the other Iranians' results being previously under study. Hence, the Post's and Pickford's theories have been re-analyzed. At the end, it has been concluded as follows.
I. Those who are in the primary stage of life, i.e. the herding one, do not
usually have color blindness.
II. During the course of time and developing stages, i.e. the agricultural,
rural, and urban ones, the frequency of color blindness is increased.