Crossword clues for the word: GREGOR The word GREGOR has appeared as an answer to at least 11 crossword clues on different crossword puzzles. Crossword clues for GREGOR Showing 1 to 11 of 11 results Clue(s) """Father of genetics"" Mendel" Botanist Mendel. Cellist Piatigorsky Geneticist Mendel Genetics pioneer Mendel Kafka's Samsa Mendel of botany Mendel of genetics Mendel who was a real pea brain? Piatigorsky Samsa of Kafka's "The Metamorphosis"