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

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

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

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

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

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

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