what is mean by genes
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A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. ... The Human Genome Project estimated that humans have between 20,000 and 25,000 genes. Every person has two copies of each gene, one inherited from each parent.
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A gene is the basic physical and functional unit of heredity.Genes are made up of DNA
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