Gene mutations can be caused by many things. These mutations are biologically important because they (1) occur at a regular rate and therefore can be controlled (2) can be passed to the offspring if they occur in any cell of the body (3) are always harmful and therefore help to eliminate weak traits (4) can result in a new variety of gene combinations in the species

2) can be passed to the offspring if they occur in any cell of the body

(4) can result in a new variety of gene combinations in the species

Explanation:

Mutations are sudden heritable changes that occurs in the genome of an organism. Mutations occurs in rare cases in about 1 of thousands or 1 of hundred thousands.

Because mutations affects gene they can be inherited, some can be deleterious leading to death, some with adverse effect leading to deformity while some can be beneficial leading to new variety and gene combinations in some species of organisms.

Mutations are usually sudden, they are spontaneous reactions that occur unexpectedly.

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