Question

Why are genetic mutations passed from parent to offspring?

Answer 1

Because the parent, say, male, has XY chromosomes, while a female has XX chromosomes. A child needs an XY for a male, and XX for female.

Your daughter will inherit the chromosomes from her parents. The X chromosome is responsible for a lot of growth and hormones. If the females received a deficient one, then she may not grow correctly.

For a male, he can inherit one X from his father and one Y from his mother. If either, or both, have a mutation in their genes, then the son will likely inherit it. Sometimes it might be more repressive.

The mutations that will be enbedded in the sperms or eggs will definitely be carried but will of course be expressed according to genetics.

Answer 2

@Compassionate How about autosomal mutations?
Your story only applies for X-chromosomal mutations.
22/23 chromosome pairs are autosomes.

Answer 3

Well, we could also take in rare XYY and the rare YY pairing, too, but he wants a basic consensus.