Answer:
The correct answer will be option- A.
Step-by-step explanation:
The genotype is the part of the genetic makeup of the cell in the form of genes which controls the particular trait of the organism.
The trait of an organism is controlled by the set of factors called alleles present in the genes. These alleles are present in the pairs on each homologous chromosomes.
Thus, the genotype of any organism is constituted by the alleles and is the correct option.