Answer:
The correct answer is - carrier.
Step-by-step explanation:
If an individual posses an allele for the disease and does not affect by the disease such a person known as the Carrier of the disease. Such a person only posses one allele of the mutated gene or disease gene and a normal gene in their genotype.
They are mostly heterozygous for the particular trait or disease, therefore, do not get affected by the only allele of the disease gene. Generally, such a disease found in a recessive gene that causes it to masked in a person and carried to the next generation.