Genotype refers to a person's genetic makeup, including all their inherited genes. These genes determine many physical and biological characteristics such as eye color, height, susceptibility to certain diseases, etc. Genotype is determined by the combination of genes inherited from both parents during fertilization.

While some traits are determined by one gene, others are affected by multiple genes or complex interactions between genes and environmental factors. Understanding a person's genotype can be useful for identifying potential health risks or determining the probability of passing certain traits to children. : class="gtx-trans-icon">