If you have a set of twins...we'll say male twins...and they each have a child, and the children have the same mother, are they, genetically speaking, full siblings? Even thought they have different fathers, their father's have the same dna, right? So is there any way to set them apart genetically?? I know on paper they'd be half siblings, but, I want to know genetically speaking, if they are full siblings...this question has been tormenting me...any help would be greatly appreciated=)
2006-10-30 04:18:28 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Biology
I'm sorry, yes, I meant identical twins.
2006-10-30 04:49:44 · update #1
Okay, if the twins came from the same zygote (monozygotic twins, aka 'identical twins) then they would be just about identical with respect to their DNA, but not completely. There will be at least a handful of differences due to mutations, and also they will both have different genomic imprinting, which is a sort of DNA modification process that doesn't actually alter the DNA sequence, but alters the way the sequence is expressed.
Then if these (nearly) identical twins had sons via the same woman, yes, their sons would be just about as genetically similar to each other as normal siblings; just about! This doesn't mean the siblings would be identical, however! They'd be related in the same way as normal brothers, nearly. This means they'd share about 50% of the exact same genes (because they each will have gotten different combinations of their mom's and dad's genes).
You'd have to look very closely at their DNA to see evidence that they didn't have the same father. For instance, one of the fathers may have had a mutation in his Y chromosome, which then would have been passed to his son. The other child would not have that same mutation, and had they been full sibilings they would both have had it.
2006-10-30 04:34:52 · answer #1 · answered by Geoffrey B 4 · 0⤊ 0⤋
If the twin fathers are identical, then yes, in that scenario the kids would be genetically the same as full siblings.
2006-10-30 04:28:22 · answer #2 · answered by Chris J 6 · 0⤊ 0⤋
are you able to ask your mom? The specific thank you to nicely known in case you have been same could be which you and your sister shared a placenta or have been interior a similar amniotic baggage. 50 years in the past once you have been born mothers and dads did no longer ask questions of the wellbeing care provider. do you realize who the twins.......mary-kate & Ashley Olsen are? they don't seem to be same twins. They have been faterinal twins, yet appeared plenty alike that they exceeded as twins on their first television tutor. The seem plenty alike. same twins can variy of their seem if in utero the single twin has much less nutrution than the different gets, or if mom is in an twist of destiny and the toddler in a certian place is the single that takes the hit. Or if one twin has a greater dramatic start than the different one there would be some transformations.There are even existence possibilities that would have same twins variety of their appearences. If one twin smokes and the different would not. It one twin has some trauma bodily and emotionally that would set that twin aside with illiness and ailment . nutrition possibilities, educations possibilities and all style of issues could make one same twin seem somewhat distinctive than the different. verify with the scientific institution and spot if there is any inforomation there. Ask relitives. kin acquaintances. You and your twin could have a chrosomal try finished. you realize to verify to verify in the experience that your DNA is same. i think of it may be nicely worth it.
2016-10-21 00:09:13 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Most types of twins are not genetically identical. Fraternal twins are the most common, and indeed have significantly different DNA. Identical twins; howver, do have identical DNA and cannot be distinguished from one another genetically.
2006-10-30 04:22:02 · answer #4 · answered by Doug K 1 · 1⤊ 0⤋
The question you did not answer is are they identical twins? if so then their DNA is identical. If they are fraternal twins then their DNA is as different as any 2 brothers.Even identical twins start being different from the time they are conceived, but their DNA does not change.
2006-10-30 04:23:48 · answer #5 · answered by science teacher 7 · 1⤊ 0⤋
Not a problem. Just paint a big red "X" on one twins right hand and a big red "X" on the other's left hand and then, all you have to do is look to see if the big red "X" is on the right hand or the left hand and you'll know which one you're dealing with. Simple....but then, I did complete the 6th grade--after only 9 years!
2006-10-30 04:27:30 · answer #6 · answered by EMAILSKIP 6 · 0⤊ 0⤋
yes,in some cases one has a mole or a birthmark ,there are other cases that their weight is different and one can be taller then the other maybe their hair can be longer or one can have more hair then the other.
2006-10-30 05:58:41 · answer #7 · answered by meow 2 · 0⤊ 0⤋