Other Genetic Principles

1 - 10 of 33 Answers

December 6, 2019: What if some mutation occurs to the Xist gene and X inactivation does not occur? Have any such cases been reported?
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August 8, 2019: After the RNA polymerase and the transcriptional initiation complex bind to the promoter, how it can recognize the transcription start site? How does it know which base is the first base to start the transcription process? And for saving time I will add another question: How can the same promoter could guide bi-directional transcription in opposite strands? 
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March 8, 2019: I read in the news recently that people can inherit mitochondria from both mom AND dad. How does this change our understanding of how mitochondria work?
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January 17, 2019: How do epigenetic changes affect an entire organism, instead of just individual cells? Shouldn't it just affect the cell(s) that have had their DNA affected?
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May 7, 2018: Is it possible for there to be three phenotypes (and only three) that are equally represented in a species? (Such as for blood types, except A, AB, and O are all equally represented.) Theoretically, what would have to be the conditions to allow for equal representation of three different phenotypes?
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January 10, 2017: If a mutation in a muscle cell in right little finger occurs, does that same mutation occur in the left big toe muscles. When and how?
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April 29, 2015: I am a female carrier of a red/green colorblind gene and have read that there is a probability of 1/2 of having an affected son if the father has normal vision. I have four sons and all four are red/green colorblind. Why don’t two have normal vision?
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July 16, 2014: If I have one child that is homozygous for A1298C and the other child is homozygous for C677T. Are my husband and I both compound heterozygotes for sure?  Or, is it possible to be both homozygous for one mutation and either heterozygous or homozygous for the other?
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February 28, 2014: In the wet lab of the Genetics exhibit at The Tech Museum, I added jellyfish DNA to a bacteria to make it glow.  What part of the jellyfish did the samples come from? The bell, tentacles, etc.
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November 20, 2012: I have seen numbers about how often closely related people in different parts of the world have kids together.  How do they get those numbers?  Do they just look through marriage records or is there some way to see it in their DNA?
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