Gray eyes are neither recessive nor dominant. Scientists used to think that a person's eye color was caused by one dominant gene, and that darker eyes (like brown eyes) were dominant; while lighter eyes (blue eyes, green eyes, hazel eyes and gray eyes) were recessive.
Brown and green alleles will always out-rule blue alleles, with brown being the most dominant. Blue will always be recessive. If both parents have a blue allele, it is likely that the child will have blue eyes.
Still, most evidence suggests that gray eyes result from both dominant and recessive genetic interactions. Some studies have found that they tend to occur when the recipient carries two identical alleles, or variations of a gene, on the same chromosome in their genome.
The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.
Their low melanin content is similar, but in fact, gray irises are significantly more rare than standard blue eyes. If you look closely, you might even spot streaks of brown, amber and gold within the gray. Even less common is a condition called heterochromia — different colored eyes.
Silver (grey) eyes: A grey-silver colour is quite rare and occurs as a result of virtually no melanin in the iris. Silver eyes are considered to be one of the rarest colours around the world, but when they do occur, this is most often seen in eastern Europe areas.
For example, in Asia and Africa, grey eyes are rare. In the U.S., you can commonly see them in people of Northern European descent. With contact lenses, however, anyone can temporarily change the color of their eyes.
Your children inherit their eye colors from you and your partner. It's a combination of mom and dad's eye colors – generally, the color is determined by this mix and whether the genes are dominant or recessive. Every child carries two copies of every gene – one comes from mom, and the other comes from dad.
"In Australians of European ancestry, the percentage of eye colours are 45 percent blue-grey, 30 percent green-hazel and 25 percent brown. If you're considering non-European ancestry it is the almost completely brown eye colour."
While lighter-colored eyes may be more sensitive to sunlight, they are not necessarily more sensitive to vision. In fact, blue eyes have better visual acuity than brown eyes. This means that blue-eyed people can see small details more clearly.
If you have grey eyes you prefer to keep to what you know and therefore can lack adventure and don't tend to take risks. However, you are smart, quick witted and a great problem solver. Out of all they eye colours, you tend to be the most mysterious which many find intriguing.
They have a strong nature and remain strong when facing external pressure. Grey eyed guys and gals are calm, organized, and keep to themselves.
Instead, gray eyes topped the chart with an average rating of 7.4, followed by blue and green eyes each scoring an average of 7.3. When broken down by gender, men ranked gray, blue, and green eyes as the most attractive, while women said they were most attracted to green, hazel, and gray eyes.
Close to 3% of the world's population have gray eyes. People with gray eyes have little or no melanin in their irises, but they have more collagen in a part of the eye called the stroma. The light scatters off the collagen in a way that makes the eyes appear gray.
Like blue eyes, grey eyes have little to no melanin in the front layer of the iris (called the stroma). But grey eyes are said to have more collagen in their stroma than blue eyes, which plays a part in their difference in color.
A condition is considered Y-linked if the altered gene that causes the disorder is located on the Y chromosome, one of the two sex chromosomes in each of a male's cells. Because only males have a Y chromosome, in Y-linked inheritance, a variant can only be passed from father to son.
The rarest eye colour is green, with only 2% of the population having them. Even rarer than green eyes is heterochromia, a condition where a person has two different coloured eyes.
Green Eyes
Green is considered by some to be the actual rarest eye color in the world, though others would say it's been dethroned by red, violet, and grey eyes.
In Brisbane, Australia, for instance, the breakdown of eye color is 25% brown, 25% green-hazel and 50% blue. But that differs around the world. “Brown eye color is predominant in African and Asian populations, and blue eyes are usually predominant in Europe.
Most people feel as though they look more like their biological mom or biological dad. They may even think they act more like one than the other. And while it is true that you get half of your genes from each parent, the genes from your father are more dominant, especially when it comes to your health.
The inheritance of eye color is more complex than originally suspected because multiple genes are involved. While a child's eye color can often be predicted by the eye colors of his or her parents and other relatives, genetic variations sometimes produce unexpected results.
Baby eye color is genetic, and genes pass from generation to generation. So if one grandparent had blue eyes, but the other had brown eyes, and you were born with brown eyes, and had a baby with another brown-eyed person, there is a chance that baby could be born with blue eyes.
What color will gray baby eyes turn? At birth your baby's eyes may appear gray or blue due to a lack of pigment. Once exposed to light, the eye color will most likely start to change to blue, green, hazel, or brown over a period of six months to one year.
Green has traditionally been called the rarest eye color. But new classifications say another color may be even less common—gray. Eye color is an inherited trait with multiple genes affecting the shade.
Gray eyes are most common in Northern and Eastern Europe. They can also be found, albeit rarely, in parts of Norway. Gray eyes are also common among North Africans and South Indians.