dz12p, I have to disagree with you. Everything I have read and seen on chimerism says that it occurs because a set of fraternal twins (with the same mother and father) share some of the same placental blood.
A more common way this could occur is if there were fraternal twins/ eggs that fused into one or one died and was reabsorbed by the other. (These eggs would have to be fertilized by two different men.)
A third way chimerism results is if a pregnant woman got some of the fetus' blood into her own system but this would not cause the fetus to have two different fathers.
So, unless I'm mistaken, you have two different sets of DNA (just as two brothers or sisters would have separate DNA) but you don't have different fathers. For that to occur, your mother would have had to have become pregnant by two men within 72 hours or less of one another. The chances of this are probably one a million. If this had happened to you there would surely be a write up in the papers or a medical journal.
If I'm wrong, please let me know where I can find information on it because I would love to include it in my research paper.
I'm not sure if it is possible yet, I haven't been able to find anything that is more recent. What I did find was a few years old, so I don't know where the technology is at now, but in theory you could use stem cell research to turn a male stem cell into an egg. It has to do with taking the nucleus of an egg out and replacing it with the nucleus of a male cell to make an egg. Thus in theory a child could have to biological fathers, but I am not sure if they have a way of getting past the imprints (what draws the chromosomes to attach to each other) or what steps might have to be taken because of the difference in the gene halfs, specifically regarding the sex of the genes. With the male sperm being the deciding factor in the sex of a child, if you also used a male cell for the other half of the chromosomes you would have to make sure that the cell used for the creation of an egg would have the chromosomes for a female.
Hahaha! How stupid of those who say it is not possible! It is certainly possible. In that case an ovum will have to be emptied of all the donor's (mother's) genetic information and filled with that of a male. Now two cases arise:
1)If that genetically modified egg is fertilized by the sperms of the same man who's genetic information was filled in the ovum, the offspring is called a clone!
2) If the genetically modified egg is fertilized by the sperms of any other man, le voila! un enfant aux deux peres!
Hello. I have been reading your conversation pardon my intrusion please but this issue is also a serious issue in my life as well I got pregnant by a man (man 1) n from 2 months-birth I was having sex with my boyfriend (man 2) n soon to be husband now. Anyway my beautiful baby girl looks excatly like my fiance (man 2) instead of the man I got pregnant by in the first place (man 1). We have compared baby pictures n facial features n everything we could possibly think of to think otherwise. I have done my research n found several cases of this so we decided to paternity test my baby with the man not suppose to be her biological father (man 2) n he was 70% her biological father n I was already pregnant when we started having sex for the first time. How can you explain that for it not being possible?
Omg I was online
Looking this subject up and saw this post down to the details of everything except man 1 personal details n getting the test done yet ( need to get $ for the DNA test first) this is the exact same scenario I have!! I was with man 1 he took off after we went to the dr apt n saw the baby on the ultrasound n listened to the heartbeat n confirmed pregnancy .... I met man 2 while 2 months prego and had sex with him 2 months prego to current n now have a four month old girl that looks just like man 2 my fianc ! It's crazy his own mother knowing her son n I hadn't even met yet at the time I got prego so knowing there was no relations with her son (man2) when I got prego can't believe how much our baby looks biologically like her son(man 2)
Re: Paternity - 2 biological fathers in one child ?
is it possible to have 2 biological fathers in one child
If something is not impossible it doesn't matter how improbable it is, sooner or later it will happen.
It certainly doesn't seem impossible for an egg to be fertilised by two different sperm at the same time and therefore it is likely to happen somewhere at some time and has probably already happened at some time in human history.
A woman has intercourse with two men. It doesn't need to be simultaneous but it would need to be very close together. The different swimming speeds of the sperm enable two sperm from different men to reach the egg at exactly the same moment and exactly at the same moment they penetrate the egg and conception has taken place.
I think in the real world such an occurrence would most likely result in a spontaneous abortion but there are going to be instances where it does not.
People can argue as much as they want about such things but it is a complete waste of time because not only is the human race still evolving at different rates in different parts of the world and even in different tribes or families but every single world citizen would need to be dna tested simultaneously to give something like a definite answer...
Why only something like a definite answer?
That is because it would only be valid for one instant and could not realistically be considered a comment of any value about either the past or the future. The world population changes greatly every second.
Doctors and scientists merely form theories to fit the data they have. Unless every single person is tested as above their data is incomplete and therefore their theories are flawed.
Fortunately, usually not flawed enough to make them invalid or unworkable...
It's not actually that much of an impossible possibility if you know what I mean. It most certainly is possible, though chances are it's extremely rare. If two sperm from one man can join with one or two or more eggs from the same woman, then how can it be impossible that two sperm from different men could join with the same egg or multiple eggs from the same woman? Some men have very slow sperm, some have very quick sperm. Cases of two-sperm-one-egg fertilizations occur frequently. There's no golden rule saying both sperm have to be from the same man, it's just vastly more likely that they are due to timing.