6 how many genes are found in the human genome the

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6. How many genes are found in the human genome? The new estimate for human genome is around 20,000 to 25,000 genes. a. How many genes are found in nematodes? About 10,000 are found in nematodes. b. How many are found in Paris japonica ?
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Paris japonica has the largest genome of any plant yet assayed, about 150 billion base pairs long. An octoploid and suspected allopolyploid hybrid of four species, it has 40 chromosomes. With 150 billion base pairs of DNA per cell , Paris japonica have the largest known genome of any living organism; the DNA from a single cell stretched out end-to-end would be longer than 300 feet. c. Speculate as to how the human genome create so much complexity? Some factors include how complex the DNA protein structure is, in which they pack together in order to form chromosomes. Also size, number of protein coding genes, number of genomes may contribute to the complexity of the human genome. 7. For a gene to be expressed it has to be transcribed and then translated. a. What needs to happen to the nucleosomes for gene expression to begin? One way is that he H4 tail also has a gene-activating function and histone modifications, acetylation at specific residues, in which its required for gene transcription. b. What is methylation? Methylation is a common epigenetic signaling tool that cells use to lock genes in the "off" position . i. What region in the gene is affected? The region of the gene that is affected includes most CpG, while CpG islands in germ-line tissues that are located near promoters of normal somatic cells, remain unmethylated, in which it allows gene expression to occur. When a CpG island in the promoter region of a gene is methylated, expression of the gene is repressed meaning that it is turned off. . ii. What are the consequences of methylation?
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DNA methylation is quite important in gene expression and cell differentiation, any errors in methylation could create a number of devastating consequences, including various diseases. c. What is acetylation? Acetylation is a chemical reaction called ethanoylation in the IUPAC nomenclature. It shows how a reaction introduces an acetyl functional group into a chemical compound. What region in the gene is affected? The genes that are affected include certain proteins. Some of these include proteins that replicate and repair any damaged genetic material. Others include deoxyribonucleic acid, in which it uses histone acetylation.
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