Chapter 12.4: Mutations Mutations: changes in the genetic material . ● gene mutations ● chromosomal mutations Sometimes cells make mistakes when copying their own DNA
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Chapter 12.4: Mutations
Mutations: changes in the genetic material
.
● gene mutations ● chromosomal mutations
Sometimes cells make mistakes when copying their own DNA
Point mutations: Gene mutations with changes in only a few nucleotides bases
● Substitutions: when one base is changed to another
● Insertions: when a base is inserted
● Deletions: when a base is removed
Chromosomal mutations involve changes in the number or structure of chromosomes.
Mutations
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