Humans and other complex organisms face a constant barrage of new harmful genetic mutations, yet somehow manage to persist and evolve despite this mutational load. New research reveals how populations can survive this onslaught through a delicate balancing act between bad and good mutations. Key Facts: Each person inherits around 2-10 new harmful mutations from …
General intelligence, known as g or IQ, has long been the focus of cognitive genetics research. But what about more specific cognitive abilities, the building blocks that make up IQ? A sweeping new meta-analysis of over 740,000 twins surprisingly suggests: Specific cognitive abilities (SCA) like reading, math and processing speed are just as heritable as …
A new study examining the family trees of over 400,000 people in England over the past 400 years suggests that rates of social mobility have remained remarkably static despite massive societal changes. The research implies that an individual’s social status is strongly influenced by genetic factors that are passed down through families for generations. Key …
A new study published in Brain Sciences has uncovered important epigenetic differences in a group of Mexican children diagnosed with autism spectrum disorder (ASD) compared to neurotypical controls. The research provides new insights into the complex interplay between genes and environment in ASD, with implications for improving diagnosis and treatment. Key facts: Researchers found 853 …
Bipolar disorder, formerly known as manic depression, is a chronic mental illness characterized by dramatic shifts in mood and energy levels. It affects about 2-4% of the population worldwide. While we still don’t fully understand what causes bipolar disorder, research over the past couple decades has uncovered important clues into the biological mechanisms behind this …
Hearing loss is a major health issue that affects people of all ages. It can be caused by loud noise, aging, disease, or certain medications and often cannot be reversed. Unlike humans, some animals like birds, fish, and frogs are able to regenerate the sensory hair cells inside their ears that detect sound. Understanding how …
Parkinson’s disease (PD) is a neurodegenerative disorder characterized by the loss of dopamine-producing neurons. Dopamine plays an important role in PD development. Here are some key facts: Dopamine is a chemical messenger in the brain involved in movement, motivation, and mood. Loss of dopamine-producing neurons causes the motor symptoms of PD like tremors, rigidity, and …
