A gene is a long sequence of nucleotides on a DNA molecule. A mutation is a change in the amount of an organism's genetic material and when a change in genotype produces a change in phenotype, the individual affected is said to be a mutant. A gene mutation involves a change in one or more of the nucleotides in a strand of DNA. The sequence of nucleotides in a gene controls the order in which amino acids are made into a protein, therefore if the sequence of nucleotides in a gene is altered by a mutation, then the order in which amino acids are made into a protein will be changed.
- American Medical Association
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- Gene Mutations
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