This chip let the brightness of the Afterburner be controlled using the Game Boy Advance's existing buttons, so there was no need to carve an extra hole in the case to mount a dimmer. Due to the construction of the Game Boy Advance case, the Afterburner light is slightly too narrow to illuminate the screen evenly. This creates what is called the trapezoid effect: a trapezoid-shaped pattern of light across the screen.
Insertion or deletion of a single letter can sometimes cause a frameshift mutation, in which the entire amino acid sequence of the resulting protein is changed. Gene or Region Duplication. Sometimes errors during DNA replication can duplicate an entire gene or region of a genome. This type of error can cause more of a protein to be produced, because after duplication, there are two genes that encode it rather than one.
Effects of Mutations on DNA Sequence. There are several types of mutations that are classified according to how the DNA molecule is altered. One type, called a point mutation, affects a single base and most commonly occurs when one base is substituted or replaced by another. Mutations also result from the addition of one or more bases, known as an insertion, or the removal of one or more bases, known as a deletion.