An error in gene replication that results in a change in the structure of genetic material is called:

A) meiosis.
B) a mutation.
C) a phenotype.
D) a sex-linked disorder.

Mutation

A change in the DNA sequence within a gene or chromosome of an organism resulting in the creation of a new character or trait not found in the parental type.

Genetic Material

Molecules inside cells that carry genetic information, primarily DNA or RNA, responsible for inheritance and guiding the development of organisms.