How much do you know about genetic testing?

It’s National DNA Day, a day when students, teachers, and the public can learn more about genetics and genomics. The day commemorates the discovery of DNA’s double helix in 1953 and the completion of the Human Genome Project in 2003.

To celebrate DNA Day and spread awareness of how our genes and genetic testing can affect our health and our healthcare, we asked people of different ages and backgrounds at popular locations around San Francisco some basic science and health questions.

Watch the many responses people came up with and play along to see how much you know. You can also read the correct answers below.

What does DNA stand for?

Deoxyribonucleic acid

How many genes does the human body have?

Scientists estimate there are approximately 20,000 human protein-coding genes.

What percentage of your and my DNA is identical?

Every human being shares more than 99% of their DNA with every other human.

What is medical genetic testing?

Genetic testing looks at your genes to see if there are any changes that may impact your health today—or in the future.

When is a good time in our lives for a medical genetic test?

Genetic testing can be useful at all stages of life.

What’s one thing genetic testing can tell us about our health?

It can… provide a medical diagnosis for unexplained symptoms

It can… confirm a suspected condition

It can… help identify new or better treatment options

It can… confirm eligibility for clinical trials

It can… identify family members who may also be at risk

It can… tell you if changes in your genes might increase your risk of disease in the future

It can… help you plan ahead so you can stay healthy

It can… help you before, during, or after pregnancy

It’s not too late to be a part of this celebration! Join the #DNADay19 conversation by following the conversation on Twitter here.