SO & I were debating this... about identical twins...

Say there is a Set of identical twin girls and a Set of identical twin boys (different families) they both get married, and both have kids- my SO is saying there was a study that says THEIR kids would be identical twins. So group 1 with one identical twin girl and a twin boy have a baby girl- group 2 with one identical twin girl and a twin boy also have a baby girl, their DNA would make them identical twins.

I dont agree.

My point was, say they each have two boys and two girls- both boys are not going to be a duplicate of eachother and both girls are not going to be a duplicate of eachother. This goes for non-twin families also. If you have six boys, not all six are going to be the same. There are thousands/millions of sperm released, each having a different "make-up" that combine with one egg, so there are MANY possibilies of DNA make up... regaurdless if its boy or girl. I hope that makes sense.

I always thought identical twins was just an oops of nature. That therebis no identical twin gene. I thought they were natural clones. Or am I understanding wrong?

You're right. Everyone carries multiple genes for the same trait...it's that genetic variance that makes evolution possible...so even if the parents were genetically identical, it's no guarantee that the children would be. It depends what genes are passed on.

Your SO is very wrong. They were not created of a split egg, and therefore would be no more genetically alike than siblings.

I think your logic is correct. Just because they both all have identical DNA doesn't mean their children will. That's like saying if an identical twin male and identical twin female (not related like your example) had three little girls then they would all be identical too.

Technically, if identical twins reproduce with another set of identical twins ....their children will biologically be siblings.

Identical twins are always the same gender....hence the term IDENTICAL.

I would have to agree with you. Also, identical twins don't run in families, so the likelihood of this scenario even happening is very slim!

Quoting forgive-n let*love:" Say there is a Set of identical twin girls and a Set of identical twin boys (different families) they ... [snip!] ... combine with one egg, so there are MANY possibilies of DNA make up... regaurdless if its boy or girl. I hope that makes sense."

Lol. No. If one couple has two girls, are they identical? No.

Is there an extremely small almost impossible chance they could somehow have children with the same Dna? Ya.

But their kids' DNA would be as similar as siblings'.

i agree with what youre saying. because i dont have the same DNA as my brothers or sisters even though we came from the same two people.

<blockquote><b>Quoting speaktruth2powr:</b>" Technically, if identical twins marry identical twins and reproduce....their children will biologically be siblings. Identical twins are always the same gender....hence the term IDENTICAL."</blockquote>




They wouldn't be siblings, they'd be cousins. They don't have the same mom and dad.

Quoting NICKEL☮POLIS:" I think your logic is correct. Just because they both all have identical DNA doesn't mean their children ... [snip!] ... male and identical twin female (not related like your example) had three little girls then they would all be identical too."

What OP is saying is that if a set of identical twins reproduces with another set of identical twins, will their children be identical to the other couple's (because their parents are genetically identical).

Quoting Minion:" I always thought identical twins was just an oops of nature. That therebis no identical twin gene. I thought they were natural clones. Or am I understanding wrong?"

Not saying they are literally going to have twins. But... singleton kids, but as 'cousins' the children would have the same DNA- be considered "identical twins"?

((Which I am disagreeing with))

Quoting lamr - 02-08-13-21:" <blockquote><b>Quoting speaktruth2powr:</b>" Technically, if identical twins marry ... [snip!] ... the term IDENTICAL."</blockquote> They wouldn't be siblings, they'd be cousins. They don't have the same mom and dad."

Genetically they would be siblings.

Quoting forgive-n let*love:" Say there is a Set of identical twin girls and a Set of identical twin boys (different families) they ... [snip!] ... combine with one egg, so there are MANY possibilies of DNA make up... regaurdless if its boy or girl. I hope that makes sense."

if two sets of identical twins got married and had kids, those kids, regardless of boy or girl, would appear as siblings on a DNA test.
you know how a DNA test can tell you how close two people are? like a paternity test can tell you if someone is your dad? the same test can tell you if someone is your cousin, or brother. except if both sets of parents are themselves identical twins, the cousins would actually look exactly like siblings do.

they would certainly NOT ever be identical. identical twins are the result of one sperm and one egg breaking in two, making two human beings. the chances of two siblings, or cousins, or any two people having 100% the same DNA are so small as to be actually as close to impossible as you can get.

Quoting speaktruth2powr:" Technically, if identical twins reproduce with another set of identical twins ....their children will ... [snip!] ... ....their children will biologically be siblings. Identical twins are always the same gender....hence the term IDENTICAL."

They'd be cousins, each twin married another twin.... yes, their DNA would be super close- but not identical. **Im not saying they will have twins themselves**