Big B Little B and eyecolour

[Ms.Hijinx]

When I had my son, I desperately wanted his eyes to stay blue, my now ex-mother-in-law,a nurse, got on her high horse about the big B and the little B of the gene pool and said that there was no way in hell that any child fathered by my now ex-husband could have blue eyes as his eyes and his father's eyes are very dark brown and as she predicted both my children have dark eyes but the child he has with his new wife, his eyes are bright blue and the child is nearly 4 so according to most books the eye colour for life is determined by 18 months at the latest so was ex my mother-in-law wrong or is my ex husband raising a child that isn't his? Either way I am happy I just wondered which was correct!

[ummmm]

You don't say what colour your or the other mothers eyes are.

[Ms.Hijinx]

Mine are green, my mother's are hazel

[Ms.Hijinx]

I haven't met his new wife , but the point I want answered is will the brown eye colour gene take over all others like my ex-mother-in-law said or not-so the mother's eye colour will be in consequential won't it!!!

[ummmm]

They say that brown is more dominant. My mum is hazel and my dad is blue. I have blue eyes and my sister has hazel.

I also have a cousin who is married to a man from trinidad. Dark skin dark eyes. The daughter has blue eyes like the mother.

So your mother in law is wrong

[Ms.Hijinx]

Thanks -She never liked me I can have a smug smile now lol

[PFA]

Hi H

Not my strong point .. this subject - but i was very interested in the argument!!!.

Here is something I remember from back in the good old days of biology ...

This looks like a much fancier version...

http://www.ndsu.nodak.edu/instruct/mcclean/pls c431/mendel/mendel1.htm

Good argument!!!

[Ms.Hijinx]

Thanks PFA-interesting reading

[TopCat1]

Hi, My Mother in law has dark brown eyes, but my husband has light blue, just like his dad, whereas, his brother has brown, like his mum.

[noxlumos]

My eyes are blue as are my wife's, our daughter was born with black eyes which lightened very slighty to a blackish brown which they have stayed. My younger daughter with her has the more usual blue eyes. I have never doubted my wife for an instant although it's been remarked on by the world and his wife that our eldest daughter can't be mine. It's all rubbish, as there is an element of the unknown in the scoring of eye colour genetically, they can only tell you what it's likely to be in most cases, but there are NO definates.

[mimififi]

brown eyes are usually dominant if both parents carry a brown gene. This brown gene can be recessive in both parents and still produce a brown eyed baby, as is the case with nox.

However, if one parent has a brown and blue and the other parent has too blue only with no brown or green anywhere in their genetic make up (thrown back to i thnk 5 generations) then the quantity of similar genes will be dominant, not the colour. So, for example, I have a brown and blue gene, my eyes are very dark brown, almost black. My husband has two blues, his grandparents all had blue eyes, etc, all of our children have pale blue eyes. Obviously, I blame my mother.

So, it is not as simple as your exmotherinlaw insisted. It is not only colour which determines dominantion.

To complicate matters further, My sister has eyes the same as me (obviously) her husband has brown eyes and one brown and one blue gene. One of her children is brown eyed with quite tawny skin; the other two look like they came from scandinavia with white hair, pale blue eyes and milk coloured skin.....? what is all that about?

I think brown is only dominant as a rule when it refers to powder paint.
:-)

[Keeprockin]

This lost me,but may be contain useful information
http://www.athro.com/evo/inherit.html

[JoolsTwo]

I have brown eyes and hubby has hazel - Our daughter has hazel and our son has brown. So I think although brown does tend to be the dominant colour, it is not always so.

[Pippa68]

I have blue eyes and Mr P has brown..I longed for a brown eyed baby but both our lovely daughters are blueys like me!

For the record my mum has green eyes, my dad has blue. Mr Ps mum has green eyes, his dad has blue.

[wazzaa]

FPA,
good god, they were heavy equations for a Sunday AM.
My Brother has very dark brown eyes and his wife has mid brown, their Daughter has very watery blue eyes. There is no question of doubt as to who the Father is. So it could always be that B + B = B? Very complicated subject, this genetics.
Caz X