1. Chromosomal Mutations
Deletion
-A deletion involves the
removal of a whole section
of a chromosome, leaving
much less information than
before
-The information is permanently
removed and not transferred
anywhere else
-Often lethal due to the loss of
so much information

2. Chromosomal Mutations
Inversion
-An inversion involves the “inversion” of genetic information; it is switched around on the same chromosome

3. Chromosomal Mutations
Duplication
-Duplication is the repeating of a segment within a chromosome
-usually no consequences except heightened gene expression

4. Chromosomal Mutations
Insertion
-During insertion, part of one chromosome is removed and placed into another chromosome
-This differs slightly from a deletion in that the removed section is given to another chromosome

5. Chromosomal Mutations
Translocation
-Two chromosomes are involved in translocation
-Part of one chromosome is switched with part of another chromosome
-usually no harmful effects; much like crossing-over

6. Chromosomal Mutations
Causes
-Can be caused by radiation causing breaking points in the DNA
-unequal crossing over
-mitotic recombination

7. Mutations Comparison
Compare and contrast chromosomal mutations with mutations that occur on a sequence of DNA below:
Chromosomal
Mutations
DNA Mutations