Final answer:
Johann Gregor Mendel is known as the father of genetics because his experiments established the rules of single-gene inheritance with independent assortment.
Step-by-step explanation:
Johann Gregor Mendel is known as the "father of genetics" because of his experiments with pea plants that established the rules of single-gene inheritance with independent assortment. Mendel demonstrated that traits are transmitted from parents to offspring independently of other traits and in dominant and recessive patterns. His work laid the foundation for the fundamental principles of heredity, and his postulates form the basis of classical genetics.