Genetic Mutations

Mutations What is a genetic mutation? A change in the genetic code Genetic mutations may have no effect, a beneficial effect, or a harmful effect depending on where they are located.

Gene Rearrangements Mutations that move an entire gene to a new location are called gene rearrangements. All of the info is still there, just out of order Transposition The gene is out of sequence. Chromosome rearrangement Parts of the whole chromosome are out of sequence

Gene Alterations Mutations that change a gene are called gene alterations. Change in the amount of info In a point mutation, a single nucleotide changes. In an insertion mutation, a sizable length of DNA is inserted into a gene. In a deletion mutation, segments of a gene are lost, often during meiosis. A mutation that causes a gene to be read in the wrong three-nucleotide sequence is called a frameshift mutation.

Types of Mutations