Chimeras, Mosaics, Twins, and Other Fun Stuff

11 - 20 of 56 Answers

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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January 23, 2015: Why do mosquitoes chase me and not my friends?
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August 5, 2014: If identical twins have the same DNA, how do you tell who the daddy is?
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July 30, 2014: I was wanting to ask a question about ASD. One of my friends has identical male twins with only one of them being diagnosed on the Autistic spectrum. Her 2 year old daughter has also been recently diagnosed to be on the autistic spectrum. There is no history of autism on either the maternal or paternal side of the family. Firstly, how is it possible that genetics would be responsible if in the set of identical twins only one child has autism? Is it possible that germline mutations occurred due to environmental factors?
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June 25, 2014: My son is going to have twins. I'm a fraternal twin and I have another brother and sister that are fraternal twins. My husband has on his side of the family twins (fraternal) and triplets - boys. Is our son having twins because of our background? Does it have to do with our genetics?
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February 5, 2014: Is there any way for a gay couple to have a child that is their own?
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November 21, 2013: My daughters were determined to be monochorionic by pathology report of the placenta after birth which means they are definitely identical twins. They present fairly different now in many subtle ways, figure balance, nose shape and abilities to roll their tongues, double jointed and the like. One appears to take after my side of the family, the other my husbands'. What can you tell me about near-identical twinning or the Lyonization theory?
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May 15, 2013: A female egg has 23 chromosomes and a male sperm also has 23 chromosomes, which is equal to 46 chromosomes and a viable embryo.  What if you took the genetic material out of an egg and put it into another egg? You'd still have 46 chromosomes and that's all that's needed, right?  The resulting offspring would be guaranteed female but wouldn't 46 chromosomes still result in viable embryo as well? Even if it's from two eggs instead of an egg and sperm? 
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October 24, 2012: How many different combinations of people are possible? I suppose it should be the number of genes multiplied by the number of alleles per gene, is that correct?  
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July 11, 2012: Is there any explanation as to why a brother and sister cannot have boys? My sister in law has only been able to have girls and my husband and I can't get pregnant with a boy.
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