During DNA replication, if a cytosine base is changed to a thymine base in a DNA segment, the sequence might code for the incorrect amino acid when translated. Mutation refers to a change in the DNA's sequence.
DNA substitutes thymine for uracil because it strengthens the genetic code and has a higher resistance to photochemical mutation. This is necessary in order to store all the information needed for life to function.
A mutation might alter a property in a way that's even advantageous, such making it possible for an organism to more effectively adapt to its surroundings. A point mutation is the most basic type of mutation. When one nucleotide base in a DNA sequence is swapped out for another, something happens.
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