Menu

Home Learn News Ask the Atlas

Explore

Technologies Diseases Treatments Clinical Trials Companies Scientists Genes Research Institutions

Beyond medicine

Agriculture Ethics Investing World map

Learn & Tools

Start here Glossary A–Z Compare technologies Timeline Lists & Rankings AI Agents ★ Saved API

About

About us Methodology Data Sources Editorial Policy Contact Disclaimers

🧭 Guided View
New to genetics? We explain every term as you browse, in plain English. Same pages, with the help built in.

⚡ Expert View
You already know the biology. Just the content — clean and compact, no extra explanations. This is the default view.

Interface language

Light mode

Term · Genetics

Chromosome

One long DNA molecule packaged with proteins. Humans normally have 46, in 23 pairs.

Written by The CRISPR Atlas editorial team Last updated Aug 25, 2026

Educational information only This page is a reference, not medical advice. Research and regulatory status change; check the last-updated date above and confirm anything important against the primary sources listed.