The scientists who advanced the study of genetics are:
1. Gregor Mendel: Known as the "father of modern genetics," Mendel conducted experiments with pea plants and established the fundamental principles of heredity.
2. Thomas Morgan: Morgan contributed to the understanding of genetics through his research with fruit flies, which provided evidence for the chromosomal theory of inheritance.
3. Marshall Nirenberg: Nirenberg deciphered the genetic code and helped elucidate how the sequence of nucleotides in DNA determines the sequence of amino acids in proteins.
These scientists made significant contributions to the field of genetics, laying the groundwork for further research and advancements in the study of heredity and inheritance patterns.