It can also be caused by a sporadic mutation in a gamete cell .
A mutation in an allele acquired by a somatic cell early in its development can be passed on to its daughter cells , including those that later specialize to gametes .
mutation can also be caused by a sporadic mutation in a gamete cell .
A mutation in an allele acquired by a somatic cell early in its development can be passed on to its daughter cells , including those that later specialize to gametes .