Pt2520 Unit 2

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1. What is the genome? A genome is an organism 's complete set of DNA that vary widely in size. The smallest known genome found in a bacterium has 600,000 DNA pairs and human and mouse genomes have 3 billion DNA pairs. 2. How many chromosomes are found in human cells? There are 46 chromosomes found in human cells that are arranged into 23 pairs. 3. What is a gene? A gene is the basic physical and functional unit of heredity. They are specifically encoded with instructions on how to make proteins and comprise only about 2% of the human genome. 4. How much of the human genome is composed of genes? What is the rest made up of? Only about 2% of the human genome is comprised of genes, an estimated 25,000 genes. The majority of cellular structures

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