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In this article. Grey eyes are a rare and distinctive eye color. This eye color only occurs in only about 3% of the global population. Their unique appearance often sets individuals with grey eyes apart. But what factors contribute to the presence of grey eyes? What Causes Grey Eyes? Are They Rare?
Eye color is determined by a person's genetics, although sometimes eye color can change due to medication side effects or certain eye conditions. Gray eyes and green eyes are considered to be the rarest eye colors.
When we examine the genetic basis for grey eyes, two genes stand out as particularly influential: the OCA2 gene and the HERC2 gene. The OCA2 gene on chromosome 15 has a significant impact on pigment production. Variations in this gene can reduce melanin in the iris, leading to lighter eye colors, including grey.
Gray eyes are also pretty isolated. Unless you're of European ancestry, you don't have much of a chance of inheriting this rare hue. Most of the world has shades of brown eyes, while gray, blue, hazel, and green eyes are typically only found in people who are of European ancestry.
Mutations are changes in the DNA sequence of a gene, and they can alter the way genes function. These mutations can lead to different colors of the iris, such as rare colors like violet or red. One example of a genetic mutation affecting eye color is a condition called heterochromia.
Introduction. Eye colour, or more correctly iris colour, is often used as an example for teaching Mendelian genetics, with brown being dominant and blue being recessive. Colour blindness ...
While it's mostly just a physical trait, eye color can sometimes signal that the baby has a health issue. This article discusses eye color genetics. It explains how genes trigger different combinations of pigments to determine what color your baby’s eyes will be.
One theory is that dark gray eyes come from a thin layer of melanin on the front layer of the iris. The blue reflection of light is clouded over by the dark layer in front causing a dark gray color. Light gray eyes are almost the opposite.
Overview. The six main eye colors are amber, blue, brown, gray, green and hazel, and many different shades and color patterns are possible. What gives my eyes their color? Your eye color refers to the color of each eye’s iris, a double-layered ring of muscle tissue around your pupil that controls how much light enters your eyes.
Eye color ranges include varying shades of brown, hazel, green, blue, gray, and in rare cases, violet and red. The traditional view was correct in which an allele that codes for brown is...