Agene has three alleles. how many different genotypes are possible at this locus in a diploid organism?

Could someone me with number one you

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

What is the key to the recognition of codominance?