Flexi Says: Two brown-eyed parents (if both are heterozygous) can have a blue-eyed baby. If both the parents have brown eyes, then there is generally a 25% chance for their child to have blue eyes. Because both the brown-eyed parents have a recessive blue-eye gene and can pass it to the next generation.
Both parents with brown eyes: 75% chance of baby with brown eyes, 18.8% chance of baby with green eyes, 6.3% chance of baby with blue eyes. Both parents with blue eyes: 99% chance of baby with blue eyes, 1% chance of baby with green eyes, 0% chance of baby with brown eyes.
The only way to present blue eyes is to inherit two copies of the blue-eyed gene. However, brown-eyed parents can pass a recessive blue-eyed gene. Therefore, two brown-eyed partners can birth a blue-eyed baby.
Brown eye colour is dominant over blue eye colour. Therefore, for the brown-eyed parents having blue-eyed child, the possibility is that both have heterozygous genotype i.e. Bb. Therefore, from the square below, it is clear that there is a 25% possibility of blue-eyed (bb) child.
Genetics of Blue Eyes
Both parents have to pass along the blue eye gene in order for their child to have blue eyes. That doesn't necessarily mean that the parents themselves have to have blue eyes; it's possible they carry the gene, but it is recessive.
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. Green eyes don't possess a lot of melanin, which creates a Rayleigh scattering effect: Light gets reflected and scattered by the eyes instead of absorbed by pigment.
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.
Iris color, just like hair and skin color, depends on a protein called melanin. We have specialized cells in our bodies called melanocytes whose job it is to go around secreting melanin. Over time, if melanocytes only secrete a little melanin, your baby will have blue eyes.
Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes. The genes control the amount of melanin inside specialized cells of the iris.
If both parents have brown eyes, it is likely that the child will also have brown eyes. However, if the parents have a parent with blue eyes, the child has a small chance of having blue eyes, too. If one parent has brown eyes and one has blue, the child could have either one.
Do grandparents' eye color affect baby? Yes! Grandparents' eye color can also impact baby's eye color. Baby eye color is genetic, and genes pass from generation to generation.
Blue is the second most common eye color globally, with an estimated 8 to 10 % of people having blue eyes. A majority of these people are of European descent, however, Black people can be born with blue eyes even though it's pretty rare.
All men inherit a Y chromosome from their father, which means all traits that are only found on the Y chromosome come from dad, not mom. The Supporting Evidence: Y-linked traits follow a clear paternal lineage.
Unlike nuclear DNA, which comes from both parents, mitochondrial DNA comes only from the mother.
Eye color is determined by genetics and genes can vary between siblings. We all have genes in our body, and our genes carry DNA. Our DNA controls the way that we express different characteristics in our body, everything from hair color to eye color to skin color.
Are all babies born with blue eyes? No. Some Caucasian babies may have eyes that appear gray or blue because of the lack of pigment. As the baby is exposed to light, the eye color can start to change.
Newborn iris color at birth is brown in 63.0% (121/192) of infants, blue in 20.8% (40/192) of infants, green/hazel in 5.7% (11/192) of infants, indeterminate in 9.9% (19/192) of infants and partially heterochromic in 0.5% (1/192) of infants.
When a baby is born with blue eyes, it has to do with the fact that very little melanin has built up. Over the first few days, weeks and months of life, the baby's melanin will increase and affect eye color.
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.
This is because you each only have blue versions to pass on to your children. That means that your kids will most likely all have blue eyes. So once dominant traits like dark eyes aren't passed on to the next generation, they can be "lost." Genes can be passed on from generation to generation.
Since blue eyes are genetically recessive, only 8 percent of the world's population has blue eyes. While blue eyes are significantly less common than brown eyes worldwide, they are frequently found from nationalities located near the Baltic Sea in northern Europe.
Did you know that green eyes are the rarest in the world? Only 2% of the population has this eye color and it is most common in Northern, Central and Western Europe. The iris (the colored part of the eye) comes from a brown pigment called melanin, which is the same pigment that causes skin colour.
Rarest Eye Colour – Green.
We found that green is the most popular lens colour, with brown coming in a close second, despite it being one of the most common eye colours. Although blue and hazel are seen as the most attractive eye colours for men and women they are surprisingly the least popular.