A somatic cell is a cell that is any of the 22 chromosome pairs that aren’t reproductive cells. So, these cells would have the full 26 chromosomes that a frog usually has.
However, since an egg cell is a reproductive cell and needs to combine with another reproductive cell to create one whole combined cell and organism, it would only have 13 chromosomes. The egg cell is like half of a somatic cell, so it will have half of however many the somatic cell will have.
