Why would they have less common DNA than siblings? Think of it this way: if the parents are identical twins, then they

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Jul 6, 2024
1:49:34pm

mvtoro Scrub

Why would they have less common DNA than siblings? Think of it this way: if the parents are identical twins, then they

have the same DNA to contribute.

So for genetic purposes, it doesn’t matter which of the two identical twins actually fathers or mothers the child. They are the same.

Genetically, they all have the same parents. There will be random variations in similarity to any sibling, like I said before (38%-61%) but they will be somewhere in that range for their cousins as well as siblings.
AND are as likely to be as or more genetically similar to those cousins as to their own siblings.

To be clear, we’re taking about non-identical for all the children. But identical-twin dads that married the same pair of identical-twin moms, right?

This message has been modified

Originally posted on Jul 6, 2024 at 1:49:34pm

Message modified by mvtoro on Jul 6, 2024 at 1:54:32pm

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mvtoro

Bio page: mvtoro
Joined: Nov 28, 2006
Last login: Sep 19, 2024
Total posts: 12,657 (802 FO)

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Messages

Author

Time

DNA testing shows I have a half sister I believe is my cousin. Anyone know how

BYU_CPU

Jul 5, 9:37am

Potentially believable. I have a few friends who took DNA tests and …

Dan

Jul 5, 9:39am

Consistently, DNA tests find that 9-10% of the time, daddy isn’t who people

Japan Coug

Jul 5, 10:17pm

Maybe you should ask your parents??

TLCougar

Jul 5, 9:40am

Uh oh. Mom or Dad fooling around with the other spouse’s siblings?

WDaddy

Jul 5, 9:43am

From his perspective, it would be the dad.

Yukon

Jul 5, 10:00am

Or a child before wedlock and adopted elsewhere.

Acorn

Jul 5, 10:20am

It's one reason I get anxious at the thought of having one done.

Cougarclaw

Jul 5, 9:43am

RE: DNA testing shows I have a half sister I believe is my cousin. Anyone know how

jaromp

Jul 5, 9:46am

<< Deleted >>

JimmyZ

Jul 5, 9:47am

If it's accurate, It wouldn't even be close to the first time

fattycoug

Jul 5, 9:49am

<< Deleted >>

JimmyZ

Jul 5, 9:50am

That also could be true

fattycoug

Jul 5, 9:52am

Probably true. Return and report

JuicyJam

Jul 5, 9:54am

My wife just had this happen recently. A person popped up on DNA that appears

TicoBrown

Jul 5, 9:59am

Happens a lot more than you'd expect.

Jul 5, 10:24am

Happens often. Likely accurate.

WallaX2

Jul 5, 10:29am

It’s almost certainly true. The tests are extremely accurate at that level of genetic relationship

Jul 5, 10:32am

my FIL had a child out of wedlock that was adopted. Never told his wife or

qwerew

Jul 5, 10:35am

It told me I had a half-brother. Freaked me out for about a week.

DomCasual

Jul 5, 10:36am

This. I have a half-niece that showed up on my 23 and me. She is my half

Cougarbib

Jul 5, 11:08am

It is estimated that 5-10% of Americans are mistaken on who their biological

Parker Schnabel

Jul 5, 10:41am

We're all one big, happy family

Jul 5, 10:56am

Seems like it’s probably 3-4% generally. It’s a tricky question because methodology is important. Studies that look at

mvtoro

Jul 5, 11:01am

I’ve read that it’s closer to 10% than 5%, globally.

Japan Coug

Jul 5, 10:20pm

It's the off season so it would be great if you kept this a running story. Let us know what your parents say. TIA.

byuTX

Jul 5, 10:43am

My wife's report showed a half brother. It turned out...

BYU-TIFUL

Jul 5, 10:48am

RE: My wife's report showed a half brother. It turned out...

byuTX

Jul 5, 11:21am

I don't want to get into many details, but

BYU-TIFUL

Jul 5, 11:45am

So did her mom act sorry about the affair, or did she try to justify it?

HiLife

Jul 5, 11:50am

Definitely sorry

BYU-TIFUL

Jul 5, 12:00pm

I don’t know why, but that explanation made me personally feel better. I guess this whole topic, and my subsequent ADHD

mvtoro

Jul 5, 12:36pm

Yep. And when people long for the good old days when this stuff didn't happen they must mean pre-human times

byuTX

Jul 5, 1:21pm

Thanks for the info. I'm genuinely curious about these situations. Seems like it worked out remarkably well with the

byuTX

Jul 5, 1:20pm

Probably factual. Hunter Biden had an affair with his sister-in-law. No kids,

Cougarbib

Jul 5, 11:03am

Now do one of Trump's widely known and very factual affairs

byuTX

Jul 5, 11:22am

None of those would have resulted in a half sibling. That is why I gave the

Cougarbib

Jul 5, 1:31pm

<< Deleted >>

JimmyZ

Jul 5, 1:52pm

I said he has not had an affair with his brother’s wife. This is not difficult 2

Cougarbib

Jul 5, 2:48pm

It’s dumb to bring politics in it and we all understand how it could work. Plus DT’s would have just ended in abortion

byuTX

Jul 6, 6:49am

I didn’t bring politics into it. U keep doing that. What office did Hunter Biden

Cougarbib

Jul 6, 8:10am

lol ok

byuTX

Jul 6, 8:55am

And this is why they’re illegal in France where half the people think it’s

molodyets

Jul 5, 11:10am

That’s crazy to me. I had to look it up to make sure it’s true. I can understand the “compelling government interest” in

mvtoro

Jul 5, 12:04pm

Well, this seems to imply that non-paternity is relatively low in France:

mvtoro

Jul 5, 12:09pm

That is the advantage of not researching it - it makes it look low. DNA tests

Cougarbib

Jul 5, 1:33pm

None of the DNA companies show “half siblings” that I’ve seen but ancestry.com makes it pretty easy to figure out based

Zach Morris

Jul 5, 11:55am

My wife found a first cousin that we didn’t know existed through DNA testing. He contacted the family when he got the

cheezedawg

Jul 5, 12:51pm

I've had 3 individuals that were like 3rd-4th cousins who show up related, but

EM_Puma

Jul 5, 1:12pm

MIL escaped a terrible marriage when HCBW was a toddler. Bio father was a mess.

TailgateU

Jul 5, 1:36pm

Found out I had two more cousins because of these DNA tests. Also, my wife’s

rainorsnow

Jul 5, 3:37pm

Wow, your fam certainly like to keep things interesting, lol

jaromp

Jul 5, 10:07pm

I met a new cousin about seven years ago through DNA testing, discovered that

LV Mike

Jul 5, 3:45pm

That’s crazy

Jul 5, 10:50pm

You share 25% of your DNA with a half-sister, but only 12.5% with a 1st cousin.

Japan Coug

Jul 5, 10:15pm

you have some friends that did what

Jul 5, 10:20pm

Two brothers from one family married two sisters from another family.

Japan Coug

Jul 5, 10:21pm

I have a double cousin. My mothers sister was a widow and married my Dad’s

Cougarbib

Jul 6, 1:06am

My sisters are identical twins. Their kids' tests show two moms. Those kids are

TailgateU

Jul 6, 12:06pm

RE: My sisters are identical twins. Their kids' tests show two moms. Those kids are

cruiserhead

Jul 6, 12:11pm

When a set of identical twins marries another set of identical twins, their kids

Japan Coug

Jul 6, 12:15pm

I’ve seen a couple stories online but I don’t think the genetic siblings thing is accurate. Not all the exact same gene

byuTX

Jul 6, 12:50pm

There’s variation in the specific variable genetic material that any child receives from one parent vs another. So even

mvtoro

Jul 6, 12:58pm

On average I’d suppose cousins like those in this thread would tend to have closer percentage than average cousins but

byuTX

Jul 6, 1:18pm

Why would they have less common DNA than siblings? Think of it this way: if the parents are identical twins, then they

mvtoro

Jul 6, 1:49pm

Yep, it's as if they have the same parents, because they're genetically identical

jaromp

Jul 6, 2:08pm

My sisters' kids show 2 moms on DNA tests. Their kids are genetic half siblings.

TailgateU

Jul 6, 3:20pm

I mean just slightly by percentage. But these cousins definitely wouldn’t have identical DNA as had been suggested in

byuTX

Jul 6, 2:38pm

No. They wouldn’t be identical. I think people here are saying the cousins would be as similar as siblings. I still

mvtoro

Jul 6, 6:56pm

You seem to know your DNA facts better than most. So do you know how much I

BYU_CPU

Jul 6, 5:14pm

I mean, I haven’t studied the accuracy of these tests, but the ordinary variability of common DNA for a half-sibling vs

mvtoro

Jul 6, 6:54pm

Random interesting tidbit: you should have 50% of variable DNA in common with mom, and if your a girl, with dad too. BUT

mvtoro

Jul 6, 1:19pm

Would be interested in your response to the OP.

BYU_CPU

Jul 6, 5:16pm

Here

mvtoro

Jul 6, 7:49pm

Used to work in a blood bank giving RhoGAM shots and doing blood typing

OU Cougar

Jul 6, 8:49am

I have an uncle

hereforlaughs

Jul 6, 10:07am

Here’s my story…

niqmadu

Jul 6, 12:46pm

Ps Im still trying to figure out how to submit the temple work for this

niqmadu

Jul 6, 1:59pm

<< Deleted >>

cugrz84

Jul 6, 7:22pm

Similar thing happened to my grandma.

cugrz84

Jul 6, 7:34pm

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