General Genetic Principles

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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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February 5, 2018: I keep reading about recombination. What is it and why does it matter? 
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December 13, 2017: Why do I sometimes see 6 billion base pairs of DNA and sometimes 3 billion base pairs of DNA for the human genome?
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November 16, 2017: Mendel's experiments showed that green is the recessive seed color in pea plants. Why are all the peas we have green today? 
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October 27, 2017: Is there any genetic testing that you can determine whether you are heterozygous or homozygous for eye color, hair color and other traits?
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May 25, 2017: Why do potatoes have more chromosomes than humans?
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1 - 3 de 3 Respuestas

June 4, 2009: Leí en su página de Internet acerca de los ratones que resultaron ser de diferentes colores debido a lo que comió la mamá mientras estaba embarazada. ¿Cómo funciona eso?
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September 1, 2006: El alelo dominante de un rasgo aparece como el fenotipo predominante en la población en general? Por ejemplo, la presencia de los hoyuelos es controlada por un alelo dominante, pero la mayoría de la gente no tiene hoyuelos. Por qué ocurre esto?
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September 30, 2004: Creí haber escuchado a un geneticista decir en la television que el gen del cabello rubio tambien crea ojos azules. Acaso él quiso decir que solo la gente rubia puede tener ojos azules, es esto cierto?
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