Science
Genetics & DNA Quiz
Double helixes, CRISPR, and the blueprint of life — how well do you know genetics?
Double helixes, CRISPR, and the blueprint of life — how well do you know genetics?
The human genome contains approximately 3 billion base pairs and around 20,000-25,000 protein-coding genes. Since Watson and Crick described DNA's double helix structure in 1953, genetics has revolutionized medicine, agriculture, and our understanding of life itself.
Each round presents 10 multiple-choice questions. Pick your answer, get an instant explanation tracing element names back to their Latin roots, and see your final score. Questions are randomized each attempt, so replay as many times as you like.
Questions span DNA structure, genetic inheritance, CRISPR gene editing, the Human Genome Project, and how genetics shapes who we are. From Mendel's peas to modern gene therapy, this quiz covers the full sweep of genetic science.
DNA is made of nucleotides, each containing a sugar (deoxyribose), a phosphate group, and one of four nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). A pairs with T, and G pairs with C.
CRISPR-Cas9 acts as molecular scissors, using a guide RNA to locate specific DNA sequences and the Cas9 enzyme to cut the DNA at that exact spot. Scientists can then delete, modify, or insert genes at the cut site.
The Human Genome Project (1990-2003) was an international research effort that successfully mapped all human genes. It cost approximately $2.7 billion and involved scientists from 20 institutions across 6 countries.
Last updated: March 2026