Biology
Grade-8
Easy
Question
What type of mutation happens to just one base?
- Chromosome mutation
- Point mutation
- DNA mutation
- Deletion mutation
Hint:
Point mutation occurs in just one base.
The correct answer is: Point mutation
- Point mutation is a change in a single base pair of DNA by substitution, deletion, or insertion of a single nitrogenous base.
- An example of point mutation is sickle cell anemia. It involves a mutation in a single base pair in the beta-globin chain of hemoglobin pigment of the blood.
- Point mutations may arise from spontaneous mutations that occur during DNA replication. The rate of mutation may be increased by mutagens
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