There are two genes for the eyes - dominant and recessive. Brown eyes are dominant and one only has to have one of the dominant brown eyed genes to have brown eyes. In order to have blue eyes, one has to have both eye genes recessive. No blue-eyed person will have a brown-eyed gene, but a brown eyed person can have a blue eyed gene. Example : since brown is dominant, let "B" represent the dominant brown eye gene. Let "b" represent the recessive blue eye gene. The combinations for eye color (one gene from each parent) are BB, Bb, bb. Thus BB and Bb will always be a brown eyed person. bb can only be blue eyes because since blue eyes are recessive, one must have both blue eyed genes to have blue eyes (bb). Another example on what color eyes a child will have with one brown eyed parent and the other blue eyed : Mother BB or Bb (brown) - Father bb (blue). If the mother does not have one of the recessive genes (Bb), the child will always have brown eyes (Bb) because he/she will inherit the dominant gene B from mother and b from father (Bb), which is brown. If mother has brown eyes (Bb) and father still is bb, the combinations for the child are either Bb, Bb, bb, bb or 50-50 brown or blue. NO child can have brown eyes whose parents BOTH have blue eyes (bb and bb will only produce bb, which is blue eyes). In summary, BB and Bb is brown eyes and bb is only blue eyes. We inherit one gene from each parent.
yes. if the dad has 1 recessive blue gene and 1 dominant brown gene then he can either pass on the blue gene or the brown gene.
The blue eyed gene and the brown eyed gene in humans.
It is highly unlikely, as the gene for brown eyes is dominant over the gene for blue eyes, and it's unlike the Filipino parent is carrying the blue gene. The baby will carry the gene for blue eyes, and if it's own spouse is blue-eyed, each of its children has a 50% chance of being blue-eyed.
Theoretically, a blue eyed man and a blue eyed woman cannot produce a brown-eyed child. The reason is that neither parent carries the brown-eyed gene. If the father or mother did carry the brown-eyed gene, the eyes/irises of that parent would be brown. The gene for brown is dominant over the gene for blue. However, two brown eyed parents can produce a blue eyed child. In that case, each parent with brown eyes must carry the gene for blue - the parents' eyes are brown because the brown gene is dominant over the blue gene. However, if the child inherits a blue gene from both brown eyed parents, the result will be blue eyes although both parents have brown eyes. In the case of one parent with brown eyes and one parent with blue eyes, there is a possibility that the parent with brown eyes possesses the non-dominant blue gene. If the child inherits the blue gene from that brown eyed parent, the child's eyes will be blue since the gene from the other parent with blue eyes will be blue. There is a condition known as heterochromia iridis where one eye is brown and one eye is blue. This condition is usually pathological on a neurogenic or inflammatory basis with the abnormality usually being in the lighter/ blue eye. Acquired heterochromia iridis that develops in an adult may suggest a melanoma of the iris in the brown eye.
Yes. Blue eyes are a recessive genetic trait, which means that a brown- or green-eyed person can still carry a gene for blue eyes. In this case, the blue-eyed gene is recessive, or subordinate, to the green- or brown-eyed gene. To be blue-eyed, an individual must have a recessive blue-eyed gene from both its mother and father.
There are two types of genes that brown eyed people can have. There is BB, and Bb. The blue eyed gene is bb. If two people are Bb, and they have a child, if the child receives the two bb from each person, then they will have blue eyes.
Yes, absolutely. Hazel eyes is the combination of the blue and brown eye color gene. For instance, a blue eyed mother and brown eyed father could have a hazel eye colored child. So that means all hazel eyed children can have a brown eyed child because they carry the brown eyed gene in their DNA from their father, in this case.
Most of my grandfather's generation had blue eyes that had a dark center, then brown, then a bright blue circle (called central heterochromia). Two of my mother's generation had them and none in our generation.
Yes. If the mom and dad both have one recessive gene for blue eyes, there is a 25% chance that the child will have blue eyes. Since the blue eyed gene is hidden when the brown eyed gene is present, the parents will appear to have brown eyes even if they still contain the gene.
blue eye genes are recessive so a person must receive blue eye genes from both parents, meaning they don't have any other eye color gene to give their child except blue. Blue is recessive not only to brown, but also to green eyes so if there was one gene from either side then the person's eyes would not be blue.
Technically no. If two people have blue eyes then both copies of their eye colour gene are blue. If either of them had a brown eye gene they would of had brown eyes as its the dominant gene, so when they produce an offspring neither of them have a brown eye gene to pass down. Hence the offspring will also have both genes blue, resulting in blue eyes.
Yes. The woman can be heterogeneous non-blue. That means she carries a blue eyed gene and a non-blue eyed gene. The blue eyed is normally recessive so he carries both blue eye genes and doesn't carry a non-blue gene.If two blue eyed parents have a child then the child will be blue eyed.