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Genetics questions

Started by Ethan Price81 · · 👁 5 views · 30 replies

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Participants Ethan Price81nimbledriver81Chris Morgan67Carol Jackson45amberorca192John Adams4Larry Lewis2Hannah Davis18brisknomad6graniteskipper18rapidheronCharles Wood3Jessica Cook64AKate Garcia2wearypanther
Ethan Price81 Ethan Price81 MemberOP
11 messages
joined Jul 2003
#1 ·
Basically...

Which hair color gene is actually dominant?

Specifically, could a child with a blonde father and a blonde mother (who leans toward brunette) end up with black hair?

If the dark hair gene is dominant, then neither parent would carry the dark gene, making that combo impossible—unless the father isn't actually the biological father...

By that logic, two dark-haired parents could have a light-haired child if they both happen to carry one light gene and it pairs up, I guess.

Or if one is dark and the other is light, the kid could be light if the father carries a light chromosome...

But according to that reasoning, two light-haired parents just can't have a black-haired kid, period.

So, which one is dominant? 😕

If the mods think this place belongs somewhere else, maybe they should just move it...
nimbledriver81 nimbledriver81 Active Member
96 messages
joined Aug 2007
#2 ·
It really all comes down to the prefixes—or rather, the specific genes parents pass down to their offspring. It also hinges on whether hair color is dictated by a single gene or a complex cluster of them. Think of it like a recipe: the more ingredients—or genes—you throw into the mix, the more possible combinations you end up with!
Chris Morgan67 Chris Morgan67 Member
49 messages
joined Jul 2007
#3 ·
What exactly are you suspicious about regarding her?

Well, it depends on your ancestry. Blonde genes are relatively recessive, so they can easily be overridden by traits from further back in your family tree...
But as far as eyes go, there isn't much debate. Two brown-eyed parents can't produce a blue-eyed child.
nimbledriver81 nimbledriver81 Active Member
96 messages
joined Aug 2007
#4 ·
Chris Morgan67 said:but when it comes to eye color, there really isn't any debate—you can't have two brown-eyed parents suddenly producing a blue-eyed child


🙄 No, they absolutely cannot. 🙄
Carol Jackson45 Carol Jackson45 Active Member
79 messages
joined Aug 2004
#5 ·
Chris Morgan67 said:but when it comes to eye color, there’s no debate. two brown-eyed parents can’t have a blue-eyed kid

Actually, it's the opposite. Two blue-eyed parents can't have a brown-eyed kid.

For blue eyes to show up, the kid has to inherit the recessive gene from both parents. So, a blue-eyed person carries two recessive genes. Let's say that person is the father in this scenario.
If you pair his two recessive genes with two more recessive ones (from the mother), the kid isn't getting a dominant brown-eye gene from anywhere.

In the case you're talking about, it's not just possible—it's totally normal. A dad can carry both the brown and blue eye genes. He'll have brown eyes because that's the dominant trait. If he has kids with a woman who has the same setup (brown and blue genes), there's a one-in-four shot one of those kids ends up with blue eyes since the recessive genes hit the jackpot.

, I'm pretty sure hair color isn't just down to one single gene. But whatever... 🤔
Is it a huge outlier? How old is the kid?
amberorca192 amberorca192 Active Member
118 messages
joined Oct 2005
#6 ·
Carol Jackson45 said:Isn't that a pretty big gap? How old is the kid?

I'm guessing 🤣 🤣 🤣

Date of birth:
November 16, 1983
John Adams4 John Adams4 Member
13 messages
joined Jul 2010
#7 ·
It is entirely possible for two blue-eyed parents to have a child with brown eyes—or conversely, for dark-eyed parents to produce a light-eyed child.

The genes for darker pigmentation tend to be dominant over those for lighter shades, I suppose.

The exact probability of such an occurrence—expressed as a percentage—would depend heavily on the specific genetic makeup of one's ancestors.
Ethan Price81 Ethan Price81 MemberOP
11 messages
joined Jul 2003
#8 ·
Lisa Moore61, you've got it wrong... 🤣

The baby is ten days old and isn't his (not literally or figuratively).

My mom and her husband are both blond, but a guy she went to high school with is Black...

The baby is Black...

It's a simple question: could my mom's husband be the father? I mean, what are the odds...

High school graduation was 9 months and 10 days ago.😁
Larry Lewis2 Larry Lewis2 Active Member
74 messages
joined Apr 2004
#9 ·
Amanda Barrett28 said:Two blue-eyed parents can have kids with brown eyes, and two dark-eyed parents can have kids with light eyes.

The genes for darker pigmentation tend to be dominant over the lighter ones.

As for the actual percentage chance of that happening, it really just comes down to the specific genetic map of their ancestors.

Green and brown eye colors are dominant, while blue is recessive—unless some major biological breakthrough happened in the last few years that I missed.😁

I agree that two blue-eyed folks could end up with a brown-eyed child, but honestly, it's more likely that the first neighbor or even the local old man just happens to have brown eyes. That’s probably less about genetics and more about social science at this point.😁

It’s kind of like when both Mom and Dad have perfectly standard jaws, but then the kid shows up with a massive, protruding chin.😬 But hey, that's a whole different conversation entirely.☕
Larry Lewis2 Larry Lewis2 Active Member
74 messages
joined Apr 2004
#10 ·
Ethan Price81 said:Look, you've got it all wrong... 🤣

The baby is ten days old and isn't his—not biologically, and certainly not figuratively.

Her mom and her husband are both white, but a guy her mom went to high school with is Black...

And the baby is Black...

It’s a straightforward question: could her husband be the father? I mean, what are the odds here...

That high school reunion was exactly nine months and ten days ago.😁

My real question is, does anyone actually have the guts to demand a paternity test? And if they don't, is anyone going to care when all they get back is some useless, "know-it-all" advice from random people on an internet forum?😁
Ethan Price81 Ethan Price81 MemberOP
11 messages
joined Jul 2003
#11 ·
Honestly, I don't really care how they reach their decision. I'm just here as part of the local grapevine, trying to figure out which kid is actually theirs—or at least making a guess that seems most likely... 😁
Carol Jackson45 Carol Jackson45 Active Member
79 messages
joined Aug 2004
#12 ·
Ethan Price81 said:the baby is ten days old

That’s why I’m asking. Newborns often have dark hair, but it usually falls out later to reveal their actual light 😍

Amanda Barrett28 said:Two blue-eyed parents can have kids with brown eyes

Nope. That’s just basic genetics—and common sense.
Hannah Davis18 Hannah Davis18 Active Member
170 messages
joined Sep 2008
#13 ·
Lisa Moore61 said:Brown and green eye colors are dominant, blue is recessive, unless biology has totally changed in the last few years😁

I mean, yeah, two blue-eyed parents can have a kid with brown eyes, but honestly? It’s probably just because the first neighbor or priest you meet happens to have brown eyes. That's more about social stuff than actual genetics, I guess.😁

so I guess I'm the outlier
😬
like, both my folks have brown eyes, my two sisters are blonde-eyed, and then there's me—brown eyes.
Carol Jackson45 Carol Jackson45 Active Member
79 messages
joined Aug 2004
#14 ·
Hannah Davis18 said:so I'm the odd one out😬
basically, both my old men have brown eyes, my 2 sisters are blondes, and I've got brown eyes.

That’s just how it works. The reverse—blue-eyed parents having a brown-eyed kid—that's actually rare.
Larry Lewis2 Larry Lewis2 Active Member
74 messages
joined Apr 2004
#15 ·
Not🙂

Since both of your parents carry that blue eye gene, which clearly showed up in your sister🙂

If both of your folks had blue eyes and you ended up with blue eyes while your sister had brown, then you’d be the outlier😁
Hannah Davis18 Hannah Davis18 Active Member
170 messages
joined Sep 2008
#16 ·
whatever, I'm just kidding:
my sister's got such killer eye color; meanwhile, I totally missed out. genetics are a joke, I guess.
👎
Larry Lewis2 Larry Lewis2 Active Member
74 messages
joined Apr 2004
#17 ·
Your kids are going to be gorgeous, just make sure you raise them right.😁

Your sister is high-class, and honestly, you’ve got great genes yourself.😬

And cut the crap, your kids are beautiful.😍
Hannah Davis18 Hannah Davis18 Active Member
170 messages
joined Sep 2008
#18 ·
I haven't laughed this hard in forever 🤣 😍
brisknomad6 brisknomad6 Active Member
222 messages
joined Nov 2012
#19 ·
Man, I’m seriously questioning if this guy is even my brother 😁

Like, Dad’s got light hair, Mom’s blonde, and then there’s him... just totally different 😬

😲 😲

I gotta go grab Mom and ask her about this 🙂

😁
Carol Jackson45 Carol Jackson45 Active Member
79 messages
joined Aug 2004
#20 ·
brisknomad6 said:Dad's a bear, mom's blonde, and he's green.😬

Well, at least you won't be guessing about the color green. You know, that fourth planet... 😬

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