Which of the following differences between the additive and the non-additive gene action is false?

Additive gene action does not show any dominance whereas, non-additive gene action shows complete dominance or incomplete dominance.

In additive gene action, both alleles are expressed equally, whereas in non–additive gene action one allele is expressed stronger than the other.

The additive allele does not contribute to the phenotype, whereas the Non-additive allele contributes to the phenotype.

All of the above.