Becker muscular dystrophy is an example of which type of genetic mutation?

Becker muscular dystrophy is indeed associated with a particular type of genetic mutation that mainly involves deletions or insertions within the dystrophin gene. It is classified as a form of dystrophinopathy, which results from mutations that affect the coding information for dystrophin, a protein essential for maintaining muscle fiber integrity.

In Becker muscular dystrophy, specific sections of the dystrophin gene may be deleted or sometimes even inserted, which leads to the production of a partially functional dystrophin protein. Although this is different from Duchenne muscular dystrophy, where the mutations typically result in a complete absence of functional dystrophin, Becker muscular dystrophy allows for some level of protein function due to the nature of the deletions. This results in a milder phenotype compared to Duchenne muscular dystrophy.

Point mutations refer to changes in a single nucleotide, while amplification involves an increase in the number of copies of a particular gene, and trinucleotide repeat expansions typically result in other types of genetic disorders, such as Huntington's disease or certain spinocerebellar ataxias. These mutations do not characterize Becker muscular dystrophy, making deletion or insertion the correct classification for the genetic mutation involved in this condition.