2 green eyed parents, brown eyed child

[SplitFountainPen]

Can someone explain this genetically?
Dh and I both have very similar green eyes with a tiny circle of brown around the center, primarily green though.
Our DC1 has solid brown eyes, all one colour.
DC2 has solid green eyes, all one colour.

My DPs have brown and blue eyes, PILs have green and blue eyes.

Why do I not present with brown eyes if I have carried that trait to pass it on? Though how can I have when I should be carrying green dominantly and blue recessively to have green eyes?

No question of us not being their parents, just purely curious!

Eye colours is mostly 2 alleles - each parent gives an allele to a child which creates a gene
You have dominant alleles - brown eyes, recessive alleles - blue and green which is weird and in the middle.

So you have allele G(green) and B(brown) = GB
Your DH also has GB

You have given DC1 your brown allele and you husband's brown alleles = BB - so they have brown eyes.
You have given DC2 your green allele and your husband's green allele = GG and they have green eyes

It’s not as simple as that. Genetics has moved on.

Eye colour, like most characteristics, is polygenic and controlled by several pairs of genes. GCSE biology is very simplistic.

So is it biologically possible for two blue-eyed people to have a brown-eyed child? That happened in a family next door to us when I was a child and I always wondered about it.

Someone needs to do a diagram

But if both OP and her DH were GB and brown is dominant, wouldn't they have brown eyes instead of green?

DH has dark brown eyes.
I have green eyes.
We have a blue eyed child.

I don’t get genetics. I’d like to understand it but I know it must be a ‘throw back’.

It has for the poster above and that's why I said that green eyes are more complex. I'm also an optometrist so understand the complexities of iris pigmentation and how that applies to the perceived colour of the iris - depending on how the melanocytes are situated inside the iris.

Dh and I both have green/hazel eyes just like you describe yours, op. We have one dc with pale turquoise eyes and one with grey eyes. I’ve always just seen genes as a bit of gamble to be honest; ancestors with all sorts of colours chuck their genes into the bag, and any of them can come out. Some have more chance of being ‘picked’ than others, that’s all.

My example may explain it.
I have green eyes
Mother brown eyes
Father blue eyes.
Both of my grandfathers had green eyes. So basically both of my parents had a green recessive gene from their fathers and I inherited both recessive genes.

My children have their father's brown eyes but both will have a recessive green gene from me. If they had children with someone who also has a recessive green gene ( or like me 2 green genes) then their children could have green eyes. But unlikely.

No, because you're only giving one allele to a child. So if you give your G one and then your husband also gives his G one the child will have green eyes

Eg1
dad blue, mum one green one blue
dc1 blue
dc2 blue
dc3 brown

Eg2
dad blue, mum brown
dc1 brown/green
dc2 blue

I go with the theory that scientists haven’t found out everything about genetics yet.

I have googled this @SplitFountainPen On several web pages, it states that it is 100% impossible for 2 green eyed people to produce a brown eyed child.

Soooooooo...

@theeyeofdoe sorry I meant shouldn't OP and DH have brown eyes? If they are GB wouldn't that cause brown eyes? But OP says they both have green eyes.

Theoretically yes. However, it's not completely linear so there is also that green gene in there.

That's bollacks.

I’m adopted

my birth mother has brown eyes
i have brown
unknown eye colour of birth father

husband has blue eyes
his father is blue, his mother is blue/green

our children: two are blue one brown

would my birth father have had blue eyes?

I remember a geneticist on MN continuously pointing out that eye colour is not as simple as people make out.

Well google it if you think it's 'bollacks.' The first 3 pages that came up for me said that 2 green eyed people cannot produce a brown eyed baby. Happy to be corrected if someone can come up with anything else.

DH and I both have green eyes, daughter has blue eyes. I was very surprised, mainly because everyone the previous 3 generations back on my maternal and paternal sides have green eyes and I’ve always dated green eyed men so was shocked when dd has blue eyes that have grown clearer and more icy blue as she gets older.

So you are saying that the OP has been unfaithful to her DH and the child isn't his?

Or maybe the genetics of eye colour is more complicated that the understanding you've gained from Google.

@SoupDragon

So you are saying that the OP has been unfaithful to her DH and the child isn't his?

No I never said that. YOU did!

This could well be wrong but my understanding:
Gb - Green being the dominant gene (why you have Green eyes) brown being recessive. You and your DH must both have this. Your children will get one from each of you therefore the possibilities of your children are GG, bb or Gb. If they get a G gene from either of you they will have Green eyes because that's dominant but if they get a b gene from both of you then they will have brown eyes.

No. You did when you said it was was impossible for the OP and her DH to have had a brown eyed child.

I'm aware of that which is why I'm curious as to the reason.
We didn't have IVF and DC1 didnt leave my room at hospital so it's completely impossible that there was any sort of mix up.