Germline mutation is the types of the mutation of the respective cell can be passed to the offspring.
Step-by-step explanation:
During the sexual reproduction somatic mutations occur in the nonreproductive cells, they are passed to the daughter cells during the mitosis but not to be the offsprings.
During the sexual reproduction, a mutation is used in large scale evolution that can be passed to the offsprings.
Its occurs in the cells such as egg and the sperm are called as the germ line mutations. A single sperms line mutation have a light effect in the gene but there is no change in the phenotype.