Chimeras, Mosaics, and Other Fun Stuff

1 - 10 of 21 Answers

March 4, 2019: My daughter had a bone marrow transplant when she was 16. The donor was male. She is now 30 and is pregnant. She just had some blood work done, and the lab called to say that the blood sample they sent in was male, not female! My daughter is now worried about the baby looking like the donor instead of her, and/or having medical issues. Does she need to worry about this?
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February 2, 2019: I was born male, and received a bone marrow transplant from my sister to treat leukemia.  A bone marrow aspiration a few years back concluded I had female DNA in my marrow, while a normal blood test would show male. 1) By this fusion am I a chimera? 2) Would I have an extra sex chromosome? And finally, I recently came out as trans (M to F). In my case, am I genetically trans? Or getting my hopes up?
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June 19, 2018: What are chimeras?
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June 27, 2016: So what happens when a chimera has children? If let's say the ovaries or testes are made up of cells from both fraternal twins, is it possible that the sperm or eggs to be made up from both twins thus making the children chimera by default?
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September 23, 2015: I heard it is possible for two twins to have different fathers. If these two twins, each with a different father, conjoin together, would the conjoined baby have two fathers? Is this even possible? If so, how would the genetics work for the conjoined baby?
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April 23, 2015: If we make clone of a husband and a wife and then if the clones have a baby, will the baby of real parents and cloned parents be same as an identical twin!???
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November 17, 2011: What type of test can be done to determine if you are a chimera?
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July 13, 2011: DNA is passed from parent to child. When a woman carries a child that came from a donor egg (not of any blood or genetic relation to the woman), due to her blood being the same blood that pumps through the heart of the fetus inside her, does that fact change or alter the DNA of the fetus/child to show any blood or genetic relation to the woman who carried that fetus/child?
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September 10, 2010: A friend who is a chemist told me about a recent discovery that fascinated me. Apparently, when a woman has a baby, not all of that baby's cells leave her body when the baby is born. He said fetal cells have been found living and growing in different sites in the mother's body. Is this true? Would that make her a mosaic? And what about babies that are miscarried--does the mom still carry cells from that baby in her body?
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November 12, 2009: I recently read about a case where a person had both a pair of X chromosomes and an X and a Y chromosome. How does that happen?
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