People with what eye color descend from a single common ancestor?

Question

Here is the question : PEOPLE WITH WHAT EYE COLOR DESCEND FROM A SINGLE COMMON ANCESTOR?

Option

Here is the option for the question :

• Hazel
• Green
• Grey
• Blue

The Answer:

And, the answer for the the question is :

Explanation:

All people with this eye color share a common ancestry. This suggests that sometime between 6,000 and 10,000 years ago, a single genetic mutation happened that influenced the ancestry of people all around the planet. Scientists from the University of Copenhagen think the mutation acted like a switch to disable melanin production.

The color of our eyes is determined by a complex interplay of genetics and environmental factors. While there are a variety of eye colors that exist in the human population, it has been suggested that people with blue eyes may have descended from a single common ancestor.

The genetic basis for eye color is largely determined by variations in the OCA2 gene, which provides instructions for producing a protein called P protein. This protein plays a critical role in the production of melanin, the pigment that gives color to our skin, hair, and eyes. The amount and type of melanin in our eyes determine their color.

While the genetics of eye color are complex and not fully understood, it is believed that the mutation responsible for blue eyes first occurred in a single individual who lived in the vicinity of the Black Sea approximately 10,000 years ago. This mutation resulted in a reduction in the amount of melanin produced in the iris, leading to the blue or gray color that we see in individuals with blue eyes.

Over time, the blue eye mutation spread throughout the population, particularly in areas of Northern Europe where it is most commonly found today. In fact, up to 80% of the population in countries such as Sweden, Norway, and Denmark have blue eyes. This is in contrast to other parts of the world, such as Africa and Asia, where blue eyes are much rarer.

While the exact reason for the spread of the blue eye mutation is not fully understood, it is believed that it may haveprovided an advantage in areas with lower levels of sunlight. This is because individuals with lighter eyes are able to more effectively absorb and utilize the available sunlight, which is essential for the production of vitamin D. Additionally, blue eyes may have been seen as a desirable trait in mate selection, leading to their increased prevalence in certain populations.

there are also some health risks associated with this trait. For example, individuals with blue eyes are more susceptible to certain types of eye diseases, such as macular degeneration and cataracts, due to their increased sensitivity to sunlight. Additionally, individuals with blue eyes are at a higher risk for certain types of skin cancer, as they have less melanin to protect their skin from UV radiation.

while the genetics of eye color are complex and not fully understood, it is believed that people with blue eyes may have descended from a single common ancestor who lived approximately 10,000 years ago. Over time, the blue eye mutation spread throughout the population, particularly in areas of Northern Europe. While blue eyes may have provided certain advantages in areas with lower levels of sunlight, they are also associated with some health risks. Despite these risks, blue eyes remain a unique and valued trait in many cultures today.