With the understanding of DNA methylation and gene expression, answer these following questions with as little word as possible. a. What is the difference between a CpG Island vs a CpG-poor region of the genome? b. What is the typical effect of 5mCpG on gene expression, and what two classes of DNA sequences are most heavily methylated? c. What is sex-specific genomic imprinting? Cite at least one example with the given example. d. What is the main function of HOX genes: specifically, the ANT-C  vs. the BX-C clusters?

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A: it occurs due to the RNA matration process and other modifications

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Q: Explain how the Sxl promoter “counts” the number of Xchromosomes in Drosophila.

A: In Drosophila, male flies have only one X chromosome and female flies have two XX chromosomes.

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Q: X chromosome inactivation during dosage compensation in mammals.

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Genome annotation

The technique of linking biological information to genome sequences is termed genome annotation. Gene annotation is the method of identifying gene locations and coding sections. It helps us understand what these genes are doing in the body through establishing structural characteristics and linking them to the actions of various proteins.