Answer: C. genotype; phenotype
Explanation:
An organism's genotype is the genetic make up of the organism. It is contain in the set of genes in its DNA and it is responsible for a particular trait.
Genotype are determined by the form of alleles.
Allele are the alternative form of a gene.
Genotype can be AA,AS,SS,AC as in human or TT,XX,XY as in plant phenotype is the physical expression of the genes controlling a traits. It is often influence by the environment. Gene together with environment gives the phenotype.
Phenotype can be access by our visuals.
Genotype TT for tallness will produce a Tall plant ( the phenotype). Other example include skin color,leave color,hair color.