Genetics is the art of studying genes. People have millions of genes. The most important genes are reproductive genes. These genes are sperms and eggs.<See last essay.> Genes are important as they can heal injuries and cure sicknesses.
Some genes can help us live in other ways. The genes in our lungs help our lungs to work. The genes in our heart help it to pump oxygen through our blood. Without these genes,we would die.
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