Here's the breakdown:

* Somatic cells (all cells in the body except gametes) in an organism do have the same number of chromosomes. This is called the diploid number (2n).

* Gametes (sex cells, like sperm and egg) have half the number of chromosomes as somatic cells. This is called the haploid number (n).

Why the difference?

When a sperm and egg fuse during fertilization, they combine their haploid sets of chromosomes to create a diploid zygote, which develops into a new organism. This process ensures that each generation has a stable number of chromosomes.

So, the correct statement would be:

All somatic cells within an organism will have the same number of chromosomes (the diploid number), which is twice the number of chromosomes found in gametes (the haploid number).