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Understanding A Genome Sequence
Understanding A Genome Sequence

... In S. cerevisiae its easy to study the effect of gene replacement by homologous recombination as its unicellular organism But for multicellular organisms like humans and mouse its very difficult as gene understudy should be replaced in every cell of the organism so that its function in any cell type ...
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Chapter 6 Are You Only as Smart as Your Genes?
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Problem Sets Fall 1995
Problem Sets Fall 1995

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lecture1

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chapter 2: genetic inheritance
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7.013 Problem Set 1 Solutions

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DNA sequencing - Rarechromo.org

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DNA sequencing - Rarechromo.org

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... (Meister et al., 2010). The positioning mechanisms appear to rely on the interaction of the inner nuclear membrane (INM) and the underlying lamina with chromatin regions dispersed throughout the linear genome, which are referred to as lamina associating domains (LADs) (Guelen et al., 2008). One mech ...
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X-inactivation



X-inactivation (also called lyonization) is a process by which one of the two copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by its being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. As nearly all female mammals have two X chromosomes, X-inactivation prevents them from having twice as many X chromosome gene products as males, who only possess a single copy of the X chromosome (see dosage compensation). The choice of which X chromosome will be inactivated is random in placental mammals such as humans, but once an X chromosome is inactivated it will remain inactive throughout the lifetime of the cell and its descendants in the organism. Unlike the random X-inactivation in placental mammals, inactivation in marsupials applies exclusively to the paternally derived X chromosome.
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