A geneticist is a professional who studies genes, traits and hereditary. There are some other terms that can be used as synonyms for the word geneticist, such as biologist, genetic researcher, molecular geneticist, and genetic counselor. Biologists are professionals who study living organisms, including how they function, interact and evolve. Similarly, genetic researchers delve into studying genes and how they affect human characteristics and disease development. Molecular geneticists use advanced techniques to understand the genetic makeup, and a genetic counselor helps people understand the risks and implications of genetic disorders. All these terms can be used interchangeably with a geneticist but may have slight differences and unique specializations.