Can twins have different eye colors?
There are two types of twins. 1)Fraternal twins: formed from two eggs fertilized by two sperms. Since this is basically like two different zygotes (let’s say that two pregnancies at the same time), the twins can have not only different eye colors but lot of other different features as well. It is just like two siblings born at different times. 2) Identical twins: here, one egg only gets fertilized. But in the process of division and development (especially in the initial stages like 2-cell stage, 4-cells stage, 8-cell stage), the dividing zygote can get seperated and can develop as two different zygotes. Here, the eye color would be the same because the basic gene system underlying them (which alone determines the eye color pattern) would also be the same.
