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Q. |
The colour of the eye depends upon the pigment present in - |
A. | cornea |
B. | iris |
C. | rods |
D. | cones |
Answer» B. iris | |
Explanation: Eye colour is a polygenic phenotypic character determined by 2 distinct factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of lightby the turbid medium in the stroma of the iris. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium (located on the back of the iris), the melanin content within the iris stroma (located at the front of the iris), and the cellular density of the stroma. |
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