Question

Sometimes genes, for no known reason(s), change their form in a process called spontaneous malformation spontaneous acceleration spontaneous combustion spontaneous mutation

Answer 1

The answer is spontaneous mutation .  

Sometimes genes, for no known reason(s), change their form in a process called spontaneous mutation.  

Mutation is the actually the alteration of the nucleotide sequence of the genome of an organism, virus, or other genetic elements permanently.  

Spontaneous mutation : It is a process in which gene automatically for no reason change their form.