Maddgirl, eye colour changing has mostly to do with melanin. Say for example babies are born with blue eyes. But over time as a baby develops and grows, the blue eyes darken in their first three years. This darkening is occurs if melanin (brown colour or pigment) was not present in at birth. Melanin can develop with age, sunspots on your skin are also melanin spots. Overtime lots of sun and not wearing sunnies can increase the amount of melanin in a persons eyes and could give a change in eye colour. But that is one theory 🙂 hope it answers your question.
I think Mia also has this one covered! but scientists are only now starting to understand how the different genes that can control eye colour as you age work together! It is one of life’s great mysteries..close to being solved by genetic scientists!!
Mia has it covered, but to expand on what Mel said as well…
We know that there are LOTS of genes that code for eye colour; it’s not just one bit of DNA that says you will have green, blue, red (huh?) eyes, it’s lots. These genes can work together to make one eye colour, or override each other to make others. It’s a pretty complicated situation for such a small thing we take for granted!
Maddgirl, eye colour changing has mostly to do with melanin. Say for example babies are born with blue eyes. But over time as a baby develops and grows, the blue eyes darken in their first three years. This darkening is occurs if melanin (brown colour or pigment) was not present in at birth. Melanin can develop with age, sunspots on your skin are also melanin spots. Overtime lots of sun and not wearing sunnies can increase the amount of melanin in a persons eyes and could give a change in eye colour. But that is one theory 🙂 hope it answers your question.
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I think Mia also has this one covered! but scientists are only now starting to understand how the different genes that can control eye colour as you age work together! It is one of life’s great mysteries..close to being solved by genetic scientists!!
0
Mia has it covered, but to expand on what Mel said as well…
We know that there are LOTS of genes that code for eye colour; it’s not just one bit of DNA that says you will have green, blue, red (huh?) eyes, it’s lots. These genes can work together to make one eye colour, or override each other to make others. It’s a pretty complicated situation for such a small thing we take for granted!
0