TH Morgan discovered the phenomenon of linkage in Drosophila melanogaster.
Ribozymes which are also known as ribonucleic acid enzymes are the RNA molecules that can catalyze specific biochemical reactions.
G. Mendel who is known as the father of modern genetics, discovered the basic principles of heredity.
Cross of F2 with the recessive parent is called test cross.
Hence, the correct match is 2. So, the correct answer is option 2.