Question

how does mutatin bring about genetic variation

Answer 1

Mutations are unintentional variations in a species. If these variations are passed down to offspring, then a larger number of organisms in that population will have that same trait. This causes genetic variation, as some of the species possess this trait, while others do not.

Answer 2

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Answer 3

mutations bring about variation by changing the dna sequence thus creating multiple alleles say of a single gene. At the same time accumulation of mutations in a gene can cause the mutated gene to encode an entirely different protein which confers a new function to the gene different from the original non - mutated gene.