The chart assumes that brown has a recessive blue, too.
That's what I was thinking too. In order for a brown eyed person to pass blue they have to have a recessive blue gene but if they got 2 brown genes then every baby will most likely have brown eyes since its dominant. My DH has brown eyes and has a recessive blue since his mom has blue eyes so he had to of gotten a blue gene since that's most likely all she could pass. I have blue eyes. DD has brown so we thought it would be neat to have one with blue too. We shall see.
Post by mymilkshake on Feb 11, 2016 16:38:10 GMT -5
Both my parents have brown eyes and brown hair. My sister has brown eyes and brown hair, but I got blue eyes and blonde hair! Everyone always joked I was from the milkman;)
I'm think my son will have blue or green eyes- it's a toss up because I have blue, H is green. And I thinnnnkk he will have light hair. H has light brown. And again, I'm blonde.
I said hazel because that it what DS and DH have but I have blue eyes so maybe she'll get mine. DS is kind of a mini version of DH so it would be nice to have one child that slightly resembled me!
DS's eyes were initially blue grey like a lot of babies, then they turned blue around 4 months and then slowly turned into a hazel color, depending on what he is wearing they look more greenish grey or greenish brown.
Post by sandandsea on Feb 11, 2016 23:06:42 GMT -5
Yeah. During my last pg someone posted a link that gave stats based on you and your parents and maybe even their parents to see a little more if there were any recessive blues hiding in there. That's where it gave us the 7% chance of blue. The chart above says 12%.
Post by frecklesnbrains on Feb 14, 2016 22:24:37 GMT -5
I'm playing some catch-up reading the threads on this board because I've been out-of-range on vacation for the past week, but I love this thread so I'll just throw in my 2 cents for now.
Eye color genetics are exceptionally complex and very poorly understood. Most generalizations that are out there are over-simplifications - you can really get almost any eye color in a kid born to parents of any other eye color.
The best generalization is fair vs. dark. People with very little pigment in the eye tend to have pale blue-grey eyes. Start adding more pigment and you get the medium blues, greens, hazels, light browns, and dark browns. So it's a fair assumption that if both you and your partner have fair eyes, you kid will likely have fair eyes too. If you both have dark eyes then your kid probably will too. But they can easily go a little bit one way or another, especially if you take into context the average amount of pigment across your families.
Whether your eyes tend to have a grey vs. green vs. amber hue (the difference between grey-blue, green, hazel, light brown, and all the hundreds of possible variations in between) is really complicated and has to do with qualities in the iris that make it scatter light differently. This is a polygenic trait, meaning there are MANY genes that contribute, and making predictions can be tricky. Blue is classically thought of as recessive, meaning you have to have either a blue-eyed parent or two parents who are carriers of the blue trait to get blue eyes. And two blue-eyed people will always have blue-eyed children. BUT, that's probably an over-simplification too as there are often exceptions to this rule.
In my family, both of my parents have light brown eyes. I have greenish eyes, and my sister has medium blue eyes. We all have sort of a medium-level of pigment, but the colors are actually quite different, reflecting the complexity of the blue vs. green vs. brown spectrum. DH has pale blue-grey eyes, so I suspect our LO will have pale-to-medium eyes, likely in the blue-green continuum.
Post by frecklesnbrains on Feb 15, 2016 10:04:58 GMT -5
You guys are too sweet
I spend way too much time thinking about these things 'cause they're fun. We could have a whole other thread dedicated to hair genetics - color and texture.
I spend way too much time thinking about these things 'cause they're fun. We could have a whole other thread dedicated to hair genetics - color and texture.
Start it and school us on that!!! I find it so interesting!
I spend way too much time thinking about these things 'cause they're fun. We could have a whole other thread dedicated to hair genetics - color and texture.
Sounds like you have the next poll! And accompanying lesson.
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