What is the main similarity between ""fog"" and frost’s poem mending wall?

They both use iambic pentameter

Explanation:

The main similarity between "fog" and frost's poem "mending wall" is that they both use iambic pentameter

Iambic pentameter is a line of verse with five metrical feet, each comprising of one short or unstressed syllable which is followed by one long or stressed) syllable, Currently, this technique is certainly the usual technique that is used in a poetry.

it takes about 30 days for it to break down

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).