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This Concept Map, created with IHMC CmapTools, has information related to: Chapter 19 Kelsey 2, primary transcript produced which contains introns, differential gene expression occurs because certain genes, different mRNA produced from same primary transcript, exons are expressed, transcription factors which are proteins, transcribed because more loosely condensed, genomic imprinting is where either paternal or maternal alleles, chromatin goes through different levels of DNA packing 2nd level, methyl groups to certain bases in DNA, condensed at 4th level, transcription by binding certain proteins, genes are trancribed, 1st level consists of nucleosomes, chromatin goes through different levels of DNA packing 1st level, DNA methylation accounts for genomic imprinting, DNA which is negatively charged, looped domains are made up of coiled nucleosomes, promoter are called enhancers, chromatin consists of different types including euchromatin, more loosely condensed than heterochromatin