February 24, 2016 | Elly, Exhibitions Developer, Science Museum

Like many, I can be grumpy if I have to wake up early. I didn't realise that it's not just the time of day - my genes might also affect my mood.

Scientists looked at the DNA of people with mood and sleep disorders. They found a change in a gene called PER3. The researchers realised PER3 probably plays an important role in the relationship between our mood and sleep-wake patterns.

Knowing this, I won't feel so guilty about my early morning bad moods.


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Is your mood affected by how much sleep you get?

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The findings might eventually lead to new drugs for mood or sleep disorders that target the PER3 gene.


Image: Flickr/Jessica Juriga

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