Mutation Flashcards
Mutation
Actual alteration in the genetic material
What is the major force that produces evolutionary change?
Mutation
Mutation is the only way to produce ____ variation
New
For mutation to have evolutionary significance, it must occur in the ___
Gametes (only the genetic information in the sex cell is passed from generation to generation)
What are some ways the mutation can be advantageous?
Mutations that lead to changed that improve survival and reproduction
What are some ways the mutation can be neutral?
No effect on survival or reproduction
What are some ways the mutation can be harmful?
Negative effects on survival or reproduction
Why and how do mutations happen?
They may occur spontaneously in response to conditions within the body or environment
Mutations may involve changes to ________
a single DNA base, a gene, or an entire chromosome
Point Mutation
Changes to a single DNA base
What is the most common type of mutation and most important source of variation?
Point Mutation
Frameshift Mutation
Addition of deletion of a base or larger section of DNA
Nondisjunction
The failure of the chromosomes to separate normally during meiosis
Deletion
Segment is lost
Duplication
Segment is present more than once
