There are three types of point mutations. There are missence mutations, nonsense mutations, and silent mutations. Missence mutations happen when there is a change of a single base pair. This tiny change causes te substitution of a different amino acid in the protein. This small letter change may have no effect, if the individual is lucky. However, it may render the protein malfunctional. An example of this would be sickle cell anemia. Second type of point mutation is nonsense mutation. This leads to an early stop codon. Unfortunately, when there is an early stop codon, the protein as a whole cannot be fully developed. This would be very bad if this protein is necessary to the individual. Lastly, silent mutation. This one is very interesting as it actually is not bad for the individual. This kind of mutation changes a base pair, but the amino acid stays the same, as some amino acids have different base pair letterings, but pair for the same protein. This being said, this has no effect on the individual
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explain what are point mutations before introducing subject
concluding sentence
I really liked the organization of the pharagraph. tha being said, I think that the pharagraph can benefit from an concluding sentence.
word choice
"This small letter change may have no effect" its important to use the correct terminology when writing about life science. codons can be illustrated and described as letters, but saying describing mutations itself as letter changes is not the right decision