Chimeras, Mosaics, Twins, and Other Fun Stuff

1 - 10 of 62 Answers

July 5, 2019: Why can crabs regenerate limbs and humans cannot?  Has any research been done so that we too may be able to possess that ability some day?
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March 21, 2019: It is said that our DNA contains as much information as a complete set of encyclopedias or more. Is this also true of plants? Like a begonia?
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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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August 1, 2018: Lions are big. Tigers are bigger. Lion-tiger hybrids are biggest. Why?
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June 19, 2018: What are chimeras?
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May 31, 2017: I am an identical twin. My sister's son had a baby. Would that on the DNA level make me more than a great aunt?
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August 4, 2016: One of the theories as to why Henry VIII of England could not have sons is that he may have had Kell positive blood. But what actually happens when you have Kell positive blood and why would that make it hard for him to have a son?
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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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June 7, 2016: I am fascinated by the story of the Komodo dragon that became pregnant without a male being involved. Is it true that these baby Komodo dragons are not clones of mom?
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