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Hox Genes
Hox Genes

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Hierarchy of Genetics
Hierarchy of Genetics

... -codes for Genes ...
Multiple choice questions
Multiple choice questions

... (numbers in brackets indicate the number of correct answers) Insulators Delimit functional domains Delimit structural domains Stimulate gene expression are usually smaller than 1000 bp overcome positional effects in gene expression Locus control regions Are located close to genes Stimulate gene expr ...
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Gene Regulation
Gene Regulation

... Some genes are regulated (turned off and on) by repressor proteins While others use proteins that enhance the rate of transcription. Operons are generally not found in Eukaryotes. Gene regulation is controlled individually and have regulatory sequences that are much more complex that those of the la ...
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12.4 Mutations

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Epigenetics of human development

Development before birth, including gametogenesis, embryogenesis, and fetal development, is the process of body development from the gametes are formed to eventually combine into a zygote to when the fully developed organism exits the uterus. Epigenetic processes are vital to fetal development due to the need to differentiate from a single cell to a variety of cell types that are arranged in such a way to produce cohesive tissues, organs, and systems.Epigenetic modifications such as methylation of CpGs (a dinucleotide composed of a 2'-deoxycytosine and a 2' deoxyguanosine) and histone tail modifications allow activation or repression of certain genes within a cell, in order to create cell memory either in favor of using a gene or not using a gene. These modifications can either originate from the parental DNA, or can be added to the gene by various proteins and can contribute to differentiation. Processes that alter the epigenetic profile of a gene include production of activating or repressing protein complexes, usage of non-coding RNAs to guide proteins capable of modification, and the proliferation of a signal by having protein complexes attract either another protein complex or more DNA in order to modify other locations in the gene.
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