Are Blue Eyes Endangered?

The video explores the history and genetics of blue eyes, a trait that is becoming rarer but unlikely to disappear. It explains that blue eyes originated from a genetic mutation in the OCA2 gene, affecting melanin production in the iris. This mutation causes light scattering, making eyes appear blue. The spread of blue eyes in Europe may be due to mating patterns and potential advantages in northern climates. Blue eyes are inherited through recessive alleles, and their prevalence is decreasing as populations mix. Despite this, blue eyes will remain a minority trait.

What percentage of the world's population has blue eyes?

• 16%

• 25%

• 50%

• 8%

Where is the mutation that led to blue eyes believed to have originated?

• East Asia

• Black Sea region

• Northern Europe

• North America

What gene is primarily associated with the blue eye mutation?

• HERC2

• MC1R

• OCA2

• TYR

How do blue eyes appear blue if they aren't actually blue?

• Presence of blue melanin

• Due to blue pigments in the iris

• Light scattering in colorless cells

• Reflection of the sky

Why are blue eyes more common in Scandinavian countries?

• Recessive alleles and historical mating patterns

• Environmental factors

• Higher mutation rates

• Dominant genetic trait