Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are the same sex and share the same genes. Sometimes called paternal twins, identical twins ...

For more than a century, scientists have debated whether intelligence is mostly a product of nature or nurture. Identical twins—those born with the same genetic blueprint—have long been the perfect ...

Some of these genetically identical mice became yellow and obese, while others stayed brown and lean. The genes weren’t different, but gene expression was — driven by DNA methylation, small tags added ...

Participation and interest in religion are largely shaped by parents when children are young. Genetic influences on religious ...

There’s a common assumption that intelligence is largely determined by genetics. After all, previously published studies found that identical twins raised apart—who share nearly identical DNA—tend to ...