Heredity and genes biology quiz online. Learn about inheritance in this quiz, human genetics quiz with MCQ trivia. Genes are the basic structural and functional units of heredity. A gene is a sequence of DNA. In this exercise, students will learn about how phenotype is an outward expression of genotype. Students will answer questions about possible outcomes in offspring due to different genetic interactions. Genes through the process of heredity are transferred from one generation to another. Learn about the genetic code and how strands of DNA influence several outcomes in offspring. | Multiple choice quiz featuring biology test questions for students to review biology topics. Click on each question and select the correct answer below and submit. Feedback is instant and at the end you will get your score. Biology quiz for 2nd, 3rd, 4th, 5th, 6th, 7th grades to review. Focus: Online science Trivia | science quiz questions | Biology Test | Biology questions.