Example question of codominance

please need asap

this are the some example question of codominance

situation in which both alleles of a gene contribute to the phenotype of the organism ?

occurs when both alleles are expressed equally in the phenotype of the heterozygote ?

so, all of this question the answer would be codominance.

Hope this helps

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.