Here is a fun two-player game to review DNA and genes. Students will recall facts about the following: DNA, chromosomes, genotype, phenotype, haploid, and diploid. To have students compete, they will share the activity so each student can answer on their device. If a student answers correctly, his cell will change to his assigned color, and the opponent's cell will also change to that color, locking him out from answering. The game is self-grading and available in Google Sheets. Answer key is included.