Which light-sensitive eye protein is linked to SAD?
Chapter 1

DNA meets daily life

Chapter 2

The chemistry of adventure

Chapter 3

Mood and social connection

Chapter 4

Internal clocks and daily rhythms

YOUR GOAL

Master of How genes shape our behavior

Ch 4 · Internal clocks and daily rhythms
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streetspirit The night owl struggle

Sep 9

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streetspirit Internal Clocks and Daily Rhythms

Lark or owl, It is in our genes. Lark or owl!

Sep 9

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streetspirit Seasonal changes and light

Sep 9

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The short sleep mutation

streetspirit A rare genetic mutation allows some people to thrive on just six hours of sleep without health issues.

Sep 9

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The night owl struggle

streetspirit Modern work and school schedules create a genetic mismatch for natural late risers.

Sep 9

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Internal clocks and daily rhythms
BETA

streetspirit Drag daily tasks to the timeline to learn how genes shape your internal clock.

Sep 9

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Fun Fact

Short sleepers: People with the rare DEC2 gene mutation feel fully rested after just six hours of sleep and are often highly optimistic and energetic.

Sep 9

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Glossary
chronotype (noun)
The natural inclination of an individual's body to sleep and wake at specific times of the day. Warwick scientists used Estonian Biobank data to link personality genes directly to an individual's natural chronotype.

Sep 9

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Gossip

What is your ultimate natural sleep personality?

Sep 9

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Quiz

A 2016 study by 23andMe analyzing how many genomes identified 15 genetic regions dictating morning or evening preferences?

Sep 9

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streetspirit The genetics of chronotypes

Sep 9

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Quiz

Seasonal Affective Disorder (SAD) is linked to genetic variations in which light-sensitive eye protein?

Sep 9

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streetspirit The short sleep mutation

Sep 9

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Quiz

Which rare gene mutation allows some individuals to thrive on just six hours of sleep with no negative side effects?

Sep 9

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Quiz

What term describes the fatigue and health issues caused when a person's genetic sleep schedule clashes with societal demands?

Sep 9

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Quiz

Which gene is a major regulator of our circadian rhythms and natural sleep-wake cycles?

Sep 9

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Quiz

What term is used to describe a person's natural, genetically determined sleep and activity schedule?

Sep 9

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Quiz

What hormone's delayed release in night owls makes it difficult for them to fall asleep early?

Sep 9

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Quiz

In what year did scientists first discover the DEC2 gene mutation that allows for natural short sleep?

Sep 9