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What does DNA stand for?
DNA stands for deoxyribonucleic acid.
True or false: humans share some DNA with bananas.
True — about 60%.
Approximately what percentage of human DNA is the same in all people?
About 99.9%.
Which is longer: all the DNA in your body or the distance to the Sun?
Your DNA — it could reach the Sun and back many times.
Is DNA the same in every cell of your body?
Mostly yes, but some cells (like red blood cells) are different.
How old is the oldest DNA scientists have successfully studied?
Over 2 million years old.
True or false: your DNA can change during your lifetime.
True — small mutations can happen.
Which part of the body is most often used for DNA tests?
Saliva or cells from inside the cheek.
Can animals be cloned using DNA nowadays?
Yes — for example, sheep, dogs, and cats.
Can stress affect your DNA?
Yes — it can influence how genes are switched on or off.
Is DNA testing 100% accurate?
No — results are probabilistic.
Can your DNA reveal what you smell like?
Partly — genes influence body odour.
Can DNA survive being frozen for thousands of years?
Yes — that’s how we study ancient humans.
Can a person have two different sets of DNA?
Yes — this rare condition is called chimerism.
