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Mutation - Coggle Diagram
Mutation
Types of Mutation
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Point mutation
Substitution
During replication, one base is inserted incorrectly, replacing the pair at the appropriate location on the complementary strand.
Insertion
In replicating DNA, one or more additional nucleotides are added, frequently causing a frameshift.
Deletion
During replication, one or more nucleotides may be “skipped” or removed, which usually causes a frameshift.
Causes
External Causes
When the DNA is exposed to certain chemicals or radiations, it causes the DNA to break down. The ultraviolet radiations cause the thymine dimers to break resulting in a mutated DNA.
Internal Causes
Most of the mutations occur when the DNA fails to copy accurately. All these mutations lead to evolution. During cell division, the DNA makes a copy of its own. Sometimes, the copy of the DNA is not perfect and this slight difference from the original DNA is called a mutation.
Definition
Mutation is the change in our DNA base pair sequence due to various environmental factors such as UV light, or mistakes during DNA replication.
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