For brown eyed and blue eyed parents.. what color are your kids' eyes?

[delilah]

If one parent is: AaBb (Brown Hair, Brown Eyes) and the other is aabb (blond hair, blue eyes), then 25% of the children will have the following combinations:
AaBb (brown hair, brown eyes)
Aabb (brown hair, blue eyes)
aaBb (blond hair, brown eyes)
aabb (blond hair, blue eyes).

This of course presumes that hair and eye color are randomly assorting. Eye color and hair color have a more complicated linkage than that, however, and the frequency of a particular linkage is related to the frequency of a given gene in the population.

That said, in my family, my mom had brown eyes, brown hair and dad had blue eyes, blond hair. Three of us, myself, my sister and one brother, had blond hair as children. My sister and brother still have blond hair. My blond brother is the only one with blue eyes. My sister and I have hazel brown eyes, and my brown haired brother has brown eyes.

With the correct background and clothing, my eyes will look more green or more brown, but never blue

 

[chadfromdallas]

If one parent is: AaBb (Brown Hair, Brown Eyes) and the other is aabb (blond hair, blue eyes), then 25% of the children will have the following combinations:
AaBb (brown hair, brown eyes)
Aabb (brown hair, blue eyes)
aaBb (blond hair, brown eyes)
aabb (blond hair, blue eyes).

This of course presumes that hair and eye color are randomly assorting. Eye color and hair color have a more complicated linkage than that, however, and the frequency of a particular linkage is related to the frequency of a given gene in the population.

Ah, 9th grade Biology...

 

[LuvN~Travel]

Our daugher got my brown eyes, our son got his Dad's blue/grey eyes. And each has hair like our's too.
Kim

 

[mermaidlady]

My mom and dad both have green eyes. My brothers all have brown eyes and I have hazel (green/brown). My DH has grey eyes and dk blonde hair. My hair is dk brown. My DD has med brown hair and china blue eyes with yellowish centers that make them look light green at times. Both boys have blonde hair and blue eyes, the younger one has the lighter hair.

 

[GlennandAnn]

DH and I both have brown eyes, his are light brown mine are dark brown and brown hair, his is light, mine is dark. Our older DS has dark brown hair and the most gorgeous super dark brown eyes (with long black eyelashes to boot!) and our younger guy has blond hair with greeny-blue eyes. DH's parents both have brown eyes and my parents are one brown one blue. I am the only brown eyed child in my family. I never thought I'd have a blue-ish eyed blond child!


Ann

 

[Tigger&Belle]

The red hair is extremely recessive, but if you ask her, she got it from the mailman

My 17yoDD has beautiful wavy-curly strawberry-blonde hair. When she was little I used to say that she got her red hair from the mailman until one day she turned to me and said, "Mommy, what do you mean that I got it from the mailman?". Uh, er, I stammered for awhile before I started telling her that I ate too many strawberries when I was pregnant with her.

T&B

 

[Sandy22]

I have brown eyes and hair, my ex has blue eyes and blond hair. DS took after his father: blue eyes and blond hair. My mother and sister also have blue eyes.

 

[debloco]

If one parent is: AaBb (Brown Hair, Brown Eyes) and the other is aabb (blond hair, blue eyes), then 25% of the children will have the following combinations:
AaBb (brown hair, brown eyes)
Aabb (brown hair, blue eyes)
aaBb (blond hair, brown eyes)
aabb (blond hair, blue eyes).

I was wondering if anyone had done the Punnett squares yet! Genetics in biology class, I loved it.
The OP wanted to know if her next baby will be a blond hair/blue eyed or brown hair/brown eyed.

First, I'm pretty sure these are two separate genetic issues. I don't think hair and eye color are linked. It's possible to have a blond hair/brown eyed child as well as a brown hair/blue eyed child. I don't know the codes for hair color, so I'll just do the eye color.

Second, the odds the book refers to is not a sum total of all of the children you have. For EACH child the odds are the same they will have blue eyes with one parent with brown eyes and one parent with blue eyes (but only if the brown-eyed parent is a dominant-recessive brown combination, more on that later). It's like the odds for coin flipping. If you flip a coin 50 times, odds are that half the time it will come up heads, half the time tails. But, if it comes up heads the first 49 times what are the odds it will be tails on flip 50? Exactly the same as the odds for flips 1-49...50-50. For each pregnancy, the odds are "reset" if you will....it doesn't matter how the other kids came out.

Third, the Punnett squares!
Brown eyed parent (Dominant-Recessive) Bb
Brown eyed parent (Dominant-Dominant) BB
Blue eyed parent (Recessive-Recessive) bb
This is why the type of brown eyed parent matters. If they are Dominant-Dominant (BB) it doesn't matter how the genes combine; all of the children will have brown eyes. The square looks like this:
B B
b Bb Bb

b Bb Bb

But, as our OP already has blue-eyed children, we can deduce that the brown-eyed parent is Dominate-Recessive (Bb). So their square looks like this:
B b
b Bb bb

b Bb bb

So the OP's chances are equal (50-50) for blue and brown eyes. I am not sure how the book came up with one in four (25%). I think that's only when both parents are Bb (Brown, but Dominant-Recessive) that the chance for blue is 25%. Maybe somebody else could explain that or figure out where I messed up!? But in any case, how the kids came out before has no bearing on how the genes combine the next time. I'm sure that no matter which way the hair/eye color goes the baby will be beautiful!

p.s. The charts are not coming out right, so imagine the single letter lined up over the columns

As for me, my DH has blue eyes and I have brown. I was hoping I was Bb, but it seems I am BB. But, our DD has hazel eyes like my mom's. For the first year of her life they were a beautiful dark gray. Go figure!

 

[SeaSpray]

My dad = BLUE eyes, blonde hair

My Mom = BROWN eyes, brown hair

Out of 7 kids:

ALL 5 boys had blonde hair and blue eyes.

My sister and I got the brown hair and brown eyes.

******************************************

As for my own children:

My brown eyes/brown hair + my ex #1's brown eyes/dark brown hair = DS17 GREEN eyes! Not hazel, not brownish green, but GREEN. DS17 has golden brown hair (medium brown hair with bright gold highlights)

My brown eyes/brown hair + my ex #2's blue eyes/dirty blonde hair = DS14 BROWN eyes! (DS14 has dirty blonde hair)

 

[luv2nascar]

I have green eyes naturally light brown hair with blond highlights
DH has hazel eyes and brown hair with red highlights
Oldest DD is blond (not sure what happened there) stick straight hair and blue eyes
youngest DD has hazel eyes (like looking into dad's only miniature) and her auburn hair is lightening up to light brown with blond highlights and curly as a perm - full ringlets. My father has blue eyes and mother has brown but my moms dad (my grandfather had blue eyes).

 

[SeaSpray]

me-brown eyes
dh-blue yes
ds-green eyes
dd1-brown eyes
dd2-blue eyes

Maybe if I would've had a third child I'd have a blue eyed one too! (I already have a green eyed and brown eyed child).

 

[HomeSweetDisney]

Parents both have brown eyes, I got green and sis got brown.

 

[slo]

Both of my girls have their fathers eyes, which are hazel.
My eyes are green.

 

[phamton]

Husband: dark hair, dark brown eyes
Me: Blonde hair, bluish-gray eyes

We have 5 kids: 4 have blue eyes and one has brown eyes.

2 blondes, 1 redhead, 1 medium brown hair, 1 dark brown hair.

 

[chadfromdallas]

My mother has blue eyes, dad has brown:

My sister has brown, my brother has brown, and I have a very interesting combo of light brown - green (looks very cool in sunlight )

 

[poohandwendy]

My Sister & BIL both have brown eyes.....and both my nephew and niece have light blue eyes. One time the doctor asked my Sister if the kids were adopted?? She said no they are both mine. He then told her that is not possible for her to have kids with such light blue eyes when they both have dark brown! My grandmother had light blue eyes, and my BIL's mother has blue eyes ~ that doctor is just loony!!!

Yeah, the doctor is wrong. But, maybe he just had his genetics mixed up...if both parents had BLUE or GREEN eyes(rr), it would be almost impossible for their children to have brown eyes(DD or Dr).

 

[kaylajr]

ME brown eyes dark hai
DH blue eyed blonde
DD 1 light brown hair and brown eyes
DD2 med brown hair and eyes that change color depending on mood and clothing but are normally a hazel color

 

[Pin Wizard]

Blue eyes and blonde hair are both recessive. I laugh when I see dark haired parents with blonde kids.

 

[eeyore kelly]

DH- blue eyes
Me- brown eyes
DS- brown
DD-green

 

[Cyndiu]

Dad - Brown
Mom - Blue

Me - Hazel

DH - Very Blue
DD - Very Blue
DS - Very Blue