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How do I know if I carry blue eye gene?
The laws of genetics state that eye color is inherited as follows: If both parents have blue eyes, the children will have blue eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive.
Can a brown-eyed person have a blue-eyed child?
Brown (and sometimes green) is considered dominant. So a brown-eyed person may carry both a brown version and a non-brown version of the gene, and either copy may be passed to his children. Two brown-eyed parents (if both are heterozygous) can have a blue-eyed baby.
What are the chances of brown-eyed parents having a blue-eyed baby?
To find any recessive traits, it’s helpful to know the grandparents’ eye colors. For example, a blue-eyed parent whose entire family has blue eyes and a brown-eyed parent whose mother and father were brown- and blue-eyed has a 50/50 chance of having a blue-eyed or brown-eyed child.
Why do old people’s eyes turn blue?
Arcus senilis is very common as people get older. This is likely because blood vessels in your eyes become more open with age and allow more cholesterol and other fats to leak into the cornea. About 60 percent of people ages 50 to 60 have this condition.
In this example one parent has blue eyes and one has brown eyes. The mother carries two blue-eye genes, so her eyes are blue. The father carries two brown-eye genes, so his eyes are brown. Brown-eye genes are dominant. This means they override blue-eye genes. The mother has two blue-eye genes and passes on a blue-eye gene to each of her children.
Which is dominant blue or brown eye genes?
The mother carries two blue-eye genes, so her eyes are blue. The father carries two brown-eye genes, so his eyes are brown. Brown-eye genes are dominant. This means they override blue-eye genes. The mother has two blue-eye genes and passes on a blue-eye gene to each of her children.
What do you need to know about the genetics of eyes?
What you need to know: DNA provides the set of recipes, or genes, used by cells to carry out daily functions and interact with the environment. 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.
Which is recessive to the brown eye allele?
The blue eye allele is recessive to the brown eye allele. For a person to have blue eyes, they must have two blue eye alleles. A brown eyed person has either one allele for brown eyes or two. They can carry the blue eye but it is not expressed. Other alleles are more complex. Some are co-dominate.