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Imprinting occurs via DNA methylation in gametes. Different parts of the genome are methylated in either eggs or sperm, and this then marks those genes throughout the lifespan of the organism, inherited epigenetically across cell divisions. See: Wood, A. J., & Oakey, R. J. (2006). Genomic imprinting in mammals: emerging themes and established theories. ...


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Don't assume a chromosome to be some X-shaped box that contains DNA inside it and DNA as a container of genes. DNA, genes, Chromatid, Chromosomes are just different names at different levels of the same thing. In molecular biology, you'll find multiple definitions of certain terms because as new insights are gained by any researcher, the definition gets ...


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Firstly, even in the centromere region, complementary base pairs are found, so, if base pairs were to be known as genes, then genes would also be present in the centromeric region. Secondly, Genes are functional units of DNA made of one or more codons which store information to make protein which gives an organism a certain characteristics. Basically, DNA is ...


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