What are the odds of having a double not related to you in any way. This individual would have the same likes/dislikes, physical attributes, tone of voice etc.?
Identical twins are born once per 80 pregnancies (statistical average). “Twin” is the closest “double” you can get. Is this the anser?
Actually I was wondering if there are doubles of any individuals who are not related in any way. I understand that DNA makes us look and act the way we do, but are there chances that there could be twins of different mothers???
Theoretically, yes. Practically, no: it would require many DNA molecules to be identical. I guess, it’s abott 10^n, where n is ~1000 or greater.
This isn’t really so much of an answer as it is an interesting tidbit.
When I was in high school, there was a girl who lived a few towns over who looked JUST LIKE ME. I never met her, but we had a lot of mutual friends and we’d seen pictures of each other. We were in no way related, (technically we weren’t even the same race!) but I guarantee we could have easily passed for sisters. MAYBE twins…
There seems to be a finite probability relative to physical attributes, maybe 5 to 8 combinations out of 500 distinct sequences. However, as far I as know, which could be way out of date, DNA has not been proven to determine likes / dislikes, tone of voice, political preferences, tastes in food, etc.
DrDoom, I may inadvertantly gave a wrong impression. Sorry.
Combinations on many genes are responsible for our physical differences. I do not know what is meant by “tone of voice, etc.” But if we move from genes up, we’ll come to chromosomes,…, and ultimately to DNA. That’s what I meant.
I once asked myself, “Barring miscellaneous mutations, what are the chances of two siblings having the same genetic basis.”
Since, for each of 26 chromosones, you get one of Mom’s two and one of Dad’s two, for each chromosone there are four possibilities.
Mom 1 - Dad 1
Mom 1 - Dad 2
Mom 2 - Dad 1
Mom 2 - Dad 2
So, the chances of my sibling getting exactly the same grouping that I did is 1 in 4^26.
Which is roughly 1 in 4.5 quadrillion.
I doubt there have been more than a few trillion people in the history of the human race, so I doubt it has ever happened.
It should read “combinations of many genes…”
I wish they provide editing (mods, not genes).
If it matters: these odds are for getting identical sets of chromosomes. There are ~100,000 genes. How many allels? Got the picture?
Not really too knowledgable on this, but can the 1st chromosone of mother join with the 26th of the dad? Thought it was a dominance of each, x-y pairwise or something like that, between the 26? Never took biology, so be nice. 