Blue eyes + blue eyes = 100% chance of blue eyes. Brown eyes + blue eyes = 50% chance of blue eyes, but only if the brown-eyed parent carries a blue-eyed gene. If not, the chance is 0% Brown eyes + brown eyes = 25%, but only if both parents carry the blue-eyed gene.
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.
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.
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 Australian Shepherd is one of a few dog breeds that commonly have two different colored eyes, called heterochromia. Aussies might have any combination of brown, blue, hazel, amber, or green eyes. Some Aussies even display more than one color within the same eye.
Heterochromia is caused by a lack of the pigment melanin in all or part of one eye. In dogs with heterochromia, the lack of melanin causes one of their eyes to appear blue or bluish-white. Heterochromia in dogs is often hereditary, meaning it is passed through their genetic makeup.
The merle gene is responsible for creating mottled patches of color in a dog's coat and blue or odd-colored eyes. However, merle is an incompletely dominant gene, so not every merle dog will have blue eyes. And while merle dogs often have blue eyes, they can also have one brown and one blue eye.
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.
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.
If one parent has brown eyes and one has blue, the child could have either one. If the parent with brown eyes has brown-eyed parents, the child will likely have brown. However, if the parent with brown eyes has a blue-eyed parent, you could have a blue-eyed baby.
Green irises (the rarest eye color) have less melanin than brown eyes but more than blue eyes, for instance. “Brown is on one end, blue on the other, and hazel and green are in between,” Dr. Patel says.
But what happens if a child has blue eyes and his parents both have brown eyes? The child inherited two blue genes; although neither parent had blue eyes, it was still part of their DNA. Blue eyes can skip a generation. In other words, this child's grandparents' eyes were probably blue.
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.
Unfortunately, unless you were born with blue eyes, there aren't any ways to naturally change your eye color. However, you can create the illusion of having blue eyes. We've answered your questions about getting blue eyes so you can keep your eyes safe and healthy while experimenting with different colors.
Where Do Blue Eyes Come From? Blue eyes come from your genetics and, more specifically, one ancestor—one that both of your parents share. Contrary to popular belief, eye color doesn't come down to just your parents (although their eye color can be a factor).
If you and your partner both have brown eyes, your baby is highly likely to have brown eyes. If one of your baby's grandparents has blue eyes, your baby's chances of having blue eyes is higher. If you have blue eyes and your partner has brown eyes, or vice-versa, your baby's odds are about even for either eye color.
Recessive Traits
In order for these traits to show outwardly, a person needs to have inherited two recessive genes—one from each parent. Typical recessive traits are tallness, blonde hair, and blue eyes.
We know that on average, we're going to inherit 25% of our DNA from each grandparent – but we also know in reality that's not what happens. We get more or less than exactly 25% from each person in a grandparent pair. It's the total of the DNA of both grandparents that adds up to 50% for the couple.
The laws of genetics state that eye color is inherited as follows: If both parents have blue eyes, the children will have blue eyes. If both parents have brown eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes.
If the father passes on an X chromosome, the baby will be genetically female, and if the father passes on a Y chromosome, the baby will be genetically male.
Daughters get two X chromosomes, one from Mother and one from Father. So Daughter will inherit X-linked genes from her father as well as her mother. Examples of X-linked recessive disorders are hemophilia, red-green color blindness, and Wiskott-Aldrich syndrome.
While blue merle Australian Shepherds are undoubtedly beautiful, they're not particularly rare. The blue merle color pattern is surprisingly common in this breed, being more frequent than the red merle.
In merles blue eyes are an extension of the merle pattering. Just as the coat has variegated pigment, so can the eyes. Blue eyes in non-merle Aussies can vary in appearance. Sometimes one eye is blue, sometimes both.
Dogs with cryptic merle (also called phantom or ghost merle) typically display little to no merle pattern and some may be misclassified as non-merles. The cryptic merle alleles occur in the lower end of the range (typically from 200-255, however, this range and designation varies by study).