Chapter 1
DNA meets daily life
View / Create
Answer
Chapter 2
The chemistry of adventure
View / Create
Answer
Chapter 3
Mood and social connection
View / Create
Answer
Chapter 4
Internal clocks and daily rhythms
View / Create
Answer
YOUR GOAL
Master of How genes shape our behavior
Ch 1 · DNA meets daily life
streetspirit Genetics of Circadian Rhythms
Lark or owl, lark or owl, my DNA defines my day.
streetspirit Genes do not act as rigid blueprints but rather influence how we react to our environments.
streetspirit Heritability measures how much differences in people's genes account for differences in their traits.
BETA
streetspirit Match daily habits to genetic traits to discover how DNA shapes your personality.
Fun Fact
Twin studies: Identical twins raised apart often share bizarrely specific habits, like using the same brand of toothpaste or flushing the toilet before using it.
Glossary
polygenic (adjective)
Controlled by or associated with more than one gene. In September 2026, Ted Schwaba demonstrated that thousands of genetic variants influence everyday habits like sleep cycles.
Controlled by or associated with more than one gene. In September 2026, Ted Schwaba demonstrated that thousands of genetic variants influence everyday habits like sleep cycles.
Quiz
What percentage of personality trait variations did the Minnesota Twin Family Study find to be linked to genetics?
Quiz
Which molecules in our cells carry the genetic instructions that shape our physical and behavioral traits?
Quiz
What is the typical heritability rate range for personality traits like extroversion and neuroticism?
Quiz
What scientific field studies how life experiences can attach chemical tags to DNA to turn genes on or off?
Quiz
Which scientific study tracked over 137 pairs of separated twins starting in 1979 to study genetics and environment?
Quiz
What do scientists use to aggregate the effects of millions of DNA variants to predict complex traits?
Quiz
In 2018, a massive genetic study of how many people identified over 1,200 variants linked to educational attainment?