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.
No and yes, because my cousin has three kids two with hazel eyes and one with blue eyes the mom has brown eyes and the dad eyes are blue so explain to me why I have been told that brown eyes are dominant.
Brown eye gene = B
Blue eye gene = b
Bb crossed with bb 50% Brown eyed (heterozygotes) and 50% blue eyed
the offspring will have blue eyes because of the physical genes
Yes, the gene for brown eyes is more dominant than the one for blue eyes
brown of course
not completely true.
Ifk
No. A recessive gene can be inherited from one parent, a dominant from another, or two alike dominants. (No such thing as two alike recessive, the gene with the furthest back dominant gene. Say a blonde little girl has a blonde hybrid mother and a brown hybrid father. She ended up getting brown recessive. Since both of her parents were hybrid, she only had a recessive hair color gene from one parent.
yes they are recessive
Well, a dominant allele carries dominant traits from parents to offspring. An example of a dominant trait is brown hair and brown eyes because these traits are most likely to show up on a human than a recessive allele. A recessive allele may carry a recessive trait from parents to offspring such as blonde hair and blue eyes, these are uncommon because they are recessive traits.
Heterozygous is when you are a hybrid, and you have one recessive and one dominant allele. Like Aa for example. people who are homozygous are either homozygous dominant or homozygous recessive. Homozygous recessive is when you have two recessive alleles, like aa. Homozygous dominant you could either have Aa or AA. A capital letter represents the dominant allele, and a lower case letter represents the recessive allele. If one of your parents had brown eyes, and one had green, and the brown is dominant and the green is recessive, and you were heterozygous, you would have brown eyes. E (lets just say stands for eyes) would be dominant and e would be recessive. if you were heterozygous, you would have Ee. You'd have brown eyes because the dominant allele masks the recessive allele. and yes im only 13 years old im sorry if its too confusing i probably didnt word it right:)
The Allele That Is Covered By The Dominant Allele Is The Recessive Allele.
No. A recessive gene can be inherited from one parent, a dominant from another, or two alike dominants. (No such thing as two alike recessive, the gene with the furthest back dominant gene. Say a blonde little girl has a blonde hybrid mother and a brown hybrid father. She ended up getting brown recessive. Since both of her parents were hybrid, she only had a recessive hair color gene from one parent.
all brown the chances of brown eyes both parents have to have blueeyes for blue eyes to become dominant but its still possible no matter what for blue or brown
yes they are recessive
This is probably the result of the brown genes being dominant and the white genes being recessive. this is correct.
Well, a dominant allele carries dominant traits from parents to offspring. An example of a dominant trait is brown hair and brown eyes because these traits are most likely to show up on a human than a recessive allele. A recessive allele may carry a recessive trait from parents to offspring such as blonde hair and blue eyes, these are uncommon because they are recessive traits.
75% or 3/4. The two F1 (offspring) mice have a genotype Bb, and express the dominant (brown) trait. When they mate, 1/4 will be BB (homozygous dominant - brown), 2/4 will be Bb (heterozygous - brown), and 1/4 will be bb (homozygous recessive - white).
Brown eyes are dominant. That's why more people have brown eyes then hazel or blue or green.
The resulting offspring will have the dominant trait. It depends on if the dominant is hetero or homo...if it was homozygous then your offspring will have a hetozygous trait showing the dominant trait (to clear this up if you are confused lets say we are talking about brown eyes(BB-dominant) vs blue eyes(bb-recessive)--a homozygous would give you a brown eyed child with Bb and but if the person is heterozygous Bb and gets with a recessive you have a chance of getting Bb or bb giving you a possibility of a brown or blue eyed child)...wow i just made that way more confusing than it had to be
In genetics, each organism will typically have 2 alleles for each trait. For a trait such as hair color, you might have an allele for red hair from your dad and an allele for brown hair from your mom. The trait for brown hair happens to be dominant to the trait for red hair so you would show the allele for brown hair. (In other words, you would have brown hair.)
Heterozygous is when you are a hybrid, and you have one recessive and one dominant allele. Like Aa for example. people who are homozygous are either homozygous dominant or homozygous recessive. Homozygous recessive is when you have two recessive alleles, like aa. Homozygous dominant you could either have Aa or AA. A capital letter represents the dominant allele, and a lower case letter represents the recessive allele. If one of your parents had brown eyes, and one had green, and the brown is dominant and the green is recessive, and you were heterozygous, you would have brown eyes. E (lets just say stands for eyes) would be dominant and e would be recessive. if you were heterozygous, you would have Ee. You'd have brown eyes because the dominant allele masks the recessive allele. and yes im only 13 years old im sorry if its too confusing i probably didnt word it right:)
With brown eyes, they are recessive.
Dominant - everything is dominant apart from diseases such as malaria, cystic fibrosis