What are genes?
Tiny groups of chemicals found inside a cell.
How do genes work?
Genes work like instructions, telling each cell how to grow and do its job.
What do genes control?
The way a whole living thing works, what it looks like, and how it survives.
What are genes made up of?
A chemical substance called DNA.
How many cells does a human contain?
Humans contain billions of cells.
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.
NEW! Voice Recording
Click the mic to start.