Concept:Genetics contributors are scientists who studied heredity, genes, or inheritance.Explanation:Gregor Mendel is known as the father of genetics.Thomas Morgan performed fruit fly experiments that confirmed chromosomal inheritance.Wilhem Johannsen introduced the terms “gene” and “genotype.”Felix Durjadin was a zoologist who studied protozoa and cytoplasm, not heredity.Therefore, he did not contribute to the development of genetics.Answer:B. Felix Durjadin