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Brown eye gene = B

Blue eye gene = b

Each person has two copies of the eye color gene in their genome, one inherited from each parent. Now if both parents only carry the gene for brown eyes, BB and BB, then their child will receive one B from each parent, ending up as BB. The same works for blue eyes, if that's the only gene both parents carry, bb and bb. Each parents gives on b to the child, who ends up as bb.

If you have one parent who only has the gene for brown eyes, BB, and one parent who only has the gene for blue eyes, bb, then all the children will have brown eyes. Example: One parent gives a B, the other gives a b. Bb = brown eyes. Here's why: When you have two alleles (coding sequences) from genes that are at odds with each other, one version will override the the other. When dealing with eye color, B always dominates b. But these children now carry the b gene in them, and could pass it down to their own children. Some of them, depending on the other parent, could end up with blue eyes.

If one parent is Bb, and the other is bb, then each time they have a child, there is a 50% chance it will have blue eyes. Example: First parent is Bb, second parent is bb, then their children will end up as either Bb, bb, Bb, bb. If both parents carry the genes for brown eyes and blue eyes, then each time they have a child, there is a 25% chance it will have blue eyes. Example: First parent is Bb, second parent is Bb, then their children will end up as either BB, Bb, Bb, bb.

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A child has brown hair and brown eyes His father has brown hair and blue eyes His mother has red hair and brown eyes The best explanation for the child having brown hair and brown eyes is that?

The child inherited both the genes for brown hair and brown eyes from both parents, as brown is likely a dominant trait in this case. The child also carries the genes for blue eyes from the father and red hair from the mother, but the dominant brown traits are expressed in the child's appearance.


The parents of Tim have brown eyes but Tim has blue eyes so How is this possible?

Tim's parents both have the recessive trait for blue eyes but their brown eye traits are the dominant ones that show. Time must have by chance gotten both the recessive genes from his parents and no brown eye genes thus his blue eyes go without the brown taking over.


Are blue eyes more dominant than brown eyes?

No, brown eyes are more dominant than blue eyes genetically. Brown eye color is a dominant trait, while blue eye color is a recessive trait. This means that if a person has one gene for blue eyes and one gene for brown eyes, the brown eye gene will be expressed.


What color hair and eye will a baby have if the father has strawberry blonde hair and brown eyes and the mother has blonde hair and blue eyes?

The baby could have a variety of hair and eye colors, as it depends on the combination of genes inherited from the parents. Possibilities include blonde hair with blue eyes, strawberry blonde hair with brown eyes, or a mix of traits from both parents. Genetic inheritance is complex and not always predictable.


Your mom eyes are brown and your dad's eyesv are gray and your brothers eyes are brown and your other brothers eyes are blue and you have green eyes why is that?

Brown eye color is dominant. Since the grandparents have blue eyes, which is recessive to brown, the parents with brown eyes can be carrying the blue eye color but the blue is not expressed. If both parents are carrying the blue eyed gene, the chances that a child would have blue eyes is 1 in 4. Yes, it is possible.

Related Questions

Why is it wrong that a daughter has a higher chance of inheriting mother's characteristics and a son' the father's?

Gender is not inherited, so traits are not inherited according to gender. (I am a male. My dad has blue eyes and my mom brown. My sister has blue eyes and I have brown.)


What is the 2 meanings for inherited?

You can inherit gene traits like brown hair or blue eyes, or there is inheritence, from wills.


Why is some of your eyes brown?

They are inherited by parents.


Why do some people have blue eyes and some have brown?

it depends on the parents. blue eyes are recessive, and brown are dominant. therefore, if any of your parent is brown eyed, and the other blue eyed, then the brown will dominate over the blue. it all depends on your genes!


What do blue eyes lack?

Brown.... blue eyes lack brown....


Is brown eyes dominate or is blue?

Brown eyes are dominant.


Which are hotter brown eyes or blue eyes?

Definitely brown eyes on a guy and blue eyes on a girl. But its your opinion.


A child has brown hair and brown eyes His father has brown hair and blue eyes His mother has red hair and brown eyes The best explanation for the child having brown hair and brown eyes is that?

The child inherited both the genes for brown hair and brown eyes from both parents, as brown is likely a dominant trait in this case. The child also carries the genes for blue eyes from the father and red hair from the mother, but the dominant brown traits are expressed in the child's appearance.


What color are Terry Fox's eyes?

his eyes are blue


What color are Robin Thicke's eyes?

Tyga has light brown eyes


The parents of Tim have brown eyes but Tim has blue eyes so How is this possible?

Tim's parents both have the recessive trait for blue eyes but their brown eye traits are the dominant ones that show. Time must have by chance gotten both the recessive genes from his parents and no brown eye genes thus his blue eyes go without the brown taking over.


Did Native Americans have blue eyes?

Brown eyes.