Point Mutation

Imagine you're typing a text message, and you accidentally hit the wrong key, changing the word "cat" to "bat." This small mistake in typing is similar to a point mutation, where a single base pair in the DNA sequence is altered. Just as a single letter change can completely alter the meaning of a word in your text, altering a single base pair can change the function of a gene, sometimes leading to significant biological effects.
Practice Version

Point Mutation: A gene mutation caused by a change in a single DNA base pair. Point mutation. A point mutation is when one letter in the DNA code is changed, which can sometimes affect how a trait is expressed.