After green eyes, gray and silver eye color are among the rarer shades. The only eye colors more rare in humans are the honey-gold amber eye color and red eyes.Continue Reading
Sometimes gray eyes have blue in them and are classified as blue eyes because the lightest shades of blue eyes tend to look gray. Gray and light blue eyes have very little pigment in the iris. Gray eyes are more common in people of Eastern European origin than in other parts of the world.
Gray eyes are most commonly found in people in Northern and Eastern Europe. They can also be seen among people in North West Africa, the Middle East and Central Asia. However, the eye color among these groups is also rare.
Red eyes are the rarest. They appear in albinos, who lack pigment in their skin, hair and eyes. The red color is caused by blood leaking into the iris.Learn more about Molecular Biology & DNA
Variations in multiple genes determine a person's eye color, according to Genetics Home Reference. Most of these genes produce, transport or store melanin, the pigment responsible for eye color. As of 2015, scientists think at least 16 genes are involved in determining eye color, explains the National Center for Families Learning.Full Answer >
The eye colors of the mother and father partially determine a baby's eye color, explains BabyMed. However, many genes work together to affect eye color, so there are no simple rules to inheritance.Full Answer >
Fruit flies have four pairs of chromosomes in each individual cell that control characteristics such as eye color, wing structure, body color and head shape. Normal fruit flies, or "wildtypes," have straight, long wings, black and tan striped bodies, bright red eyes and short antennae.Full Answer >
An ancestral trait is a genetic similarity passed down to subsequent generations, such as eye and skin color. Male pattern baldness and flushed cheeks are also considered ancestral traits.Full Answer >