Question

what is the genotype of an individual?
a) a hereditary disease
b) their observable characteristics
c) their chromosomes
d) their genes

Explanation:

The genotype of an individual refers to the genetic makeup, which is composed of their genes. A hereditary disease is a disorder related to genes but not the definition of genotype. Observable characteristics are the phenotype. Chromosomes carry genes but genotype specifically means the genes themselves.

Answer:

d) Their genes