So the main difference here is that a somatic cell is all the cell's in your body except for your reproductive cells. Those reproductive cells are called gametes. So, when a mutation occurs in a somatic cell, it really doesn't do much because it's one cell out of trillions in your body. However if a mutation occurs within a gamete, that gamete gets inherited in the offspring during sexual reproduction, and become the *blueprint* for an entire human being. That small mutation would be present in every cell throughout the whole body. Thus, that is why a mutation in a gamete, has much more severe biological consequences vs a mutation in a somatic cell. Hope this helped!
Mutation in a few somatic cells in your complete collection of millions of somatic cells normally isn't a difficulty because most cells simply die or self-destruct (apoptosis) and when it is a query when these cells don't all die its cancer. But a modification in a gamete if transferred to an offspring, every cell in the offspring's body will have that mutation. sometimes the mutation produces such a great impression that an offspring cannot even be produced. a mutation in a gamete can probably be passed on to the next generation. A mutation in a physical cell passes when the organism deteriorates.
