And the reason is because in certain individuals, they can actually have genetic changes or mutations that are not passed down from the mother or from the father, but actually start brand new in them, mutations that are present in the egg or the sperm at the time of conception but have not been passed down generation through generation within the family.
A razlog je zato što određeni pojedinci, oni mogu zapravo imati genetske promjene ili mutacije koje nisu prenesene od majke ili od oca već počinju kao novi u njima, mutacije koje su prisutne u jajašcu ili spermiju u trenutku začeća ali nisu prenošene generaciju kroz generaciju unutar obitelji.