i was told that 2 brown eyed people can not make a baby with brown eyes is this true?

Question

several people told me this and me and my husband have brown eyes and our son has blue eyes.

Answer 1

Blue eyes is a recessive gene (b). Brown eyes is a dominant gene (B). It is possible to have a blue eyed baby provided that both parents carry a recessive gene Bb. If you cross BbXBb there is a 25% chance that the baby will have blue eyes and a 75% chance of brown eyes. Therefore it is possible for both parents to have brown eyes and the baby blue eyes.

Answer 2

that is not true. That is a classic in Mendel's basic genetics dealing with dominant and recessive genes.

Let's say that the gene for Blue eyes is B (recessive), and the gene for dark eyes is D (dominant).

Each person carry 2 - so a pure dark eyes would be a DD. A blue eyes would be a BB.

When a DD person marry a BB person, babies could be DD, BB or DB or BD.

The joke is that a BD or DB person still has dark eyes... because the blue eyes gene is recessive!!! when a DB marry a BD... the baby could be very easily BB or DD or DB or BD... so it is quite easy to get a blue eyed baby!!!!

Now this is an extremely simplified version. Reality is a lot more complex, because color blending happens, and in fact there are more colors than just blue, dark and green... so the combinations are endless. It is completely possible that your baby has blue eyes yet is yours and your husband's.


To this, add that most euro-caucasian babies have dark blue eyes at birth - they change later on in life, sometimes as late as 5 yrs old - I've seen it happen.

Answer 3

Brown eyed people generally produce brown eyed children, but it depends on the grandparents of the children, too. I saw a show on tracking the Amazon women spoken of in ancient Greece to Mongolian. There are Mongolian children with light hair, skin and eyes and even freckles!
They had found an ancient Amazon mummy and managed to get tissue for a DNA sample out of the tooth. Then they found a Mongolian girl and matched the matrilinial DNA.

If two parents had been brown eyed for all their generations, it might be true that they could produce only brown eyed children. History has made human kind much more mixed than anyone wants to admit yet.

Answer 4

Eye colour is known to have a polygenic inheritance pattern, possibly governed by 6 or more genes. There are also 6 different described eye colours. Basically, dark is dominant at each of the 6 genes, and the more dominant alleles that you have the darker your eyes are. The different eye colours and the number of dominant alleles suggested in this theory are shown below.

DNA Bioscience Eye Colour Inheritance Chart:

Light blue 0 dominant alleles
Blue 1 dominant allele
Blue-green 2 dominant alleles
Hazel 3 dominant alleles
Light brown 4 dominant alleles
Brown 5 dominant alleles
Dark brown / black 6 dominant alleles


Basically, based on this theory:

2 light blue eyed parents cannot have a blue eyed (or darker eyed) child.
2 blue eyed parents can have a blue-green (or lighter) eyed child, but not hazel or anything darker.
2 blue-green eyed parents can have a light brown (or lighter) eyed child, but not brown or anything darker.
1 light brown eyed parent and 1 'blue-green' eyed parent can have a child with any of the possible eye colours.
2 dark brown or black eyed parents can have a child with any of the possible eye colours (but it is unlikely they will have a light eyed child, such as light blue or blue).
Lastly eye colour usually starts out much lighter at birth and becomes its true colour in 1 or 2 years after birth. Variations can also occur randomly.

Answer 5

No that is not true. Brown eyes are dominant and blue eyes are recessive. It is two blue eyed people that cannot have a brown-eyed chil. If you and your husband have brown eyes and your sone blue it just means that you and your husband each have a recessive gene for blue eyes, but since you also have the brown eyed gene, your eyes are brown. You each gave your son the blue eyed gene so his eyes are blue.

Blue eyed people cannot have the brown eyed gene, so they cannot give it to their children. That is why two blue eyed people cannot have a brown eyed child.

Answer 6

Brown eyes are dominant in genetics, so you only need one gene for brown eyes to have brown eyes. The other can be for blue or green or grey, whatever, so if two brown eyed people have a blue eyed child, it means that both parents carry the recessive gene for blue eyes, and the child got the two recessive blues.

It's two blue eyed people who can't have a brown eyed child. Those people just got it backwards.

Answer 7

brown is dominant over all other colors so you may have recessive genes that were hiding in there so you had to have passed on the blue genes instead of brown but if you have more babies more than likely one of them is coming out with brown eyes

Answer 8

somebody told you a lie. my parents have brown eyes and i have brown eyes so does the rest of my family. brown eyes are the most common eye color to have
However, there are times when a baby can have green eyes because of his ancestors. God is very unique.

Answer 9

Have you seen a Chinese hows eyes is other than brown. Its not true. Everyone else who said brown eyes is dominant is not totally correct. Eye color is regulated by multiple genes. Eye color can blend to a certain degree. Its like hair color.

Answer 10

I don't know exactly but it is in the genes, everyone in my immediate family my parents and my sister and my brother all have brown eyes. It all comes down to the most dominant gene.