The Atlantic – Alexandra Ossola
“In the study, published in a September issue of Proceedings of the National Academy of Sciences, researchers looked at the performance of over 6,000 sets of twins on the General Certificate of Secondary Education (GCSE), a standardized test taken by 16-year-old students in the United Kingdom. The question the researchers wanted to answer was: How much of a role do genetic traits play on students’ achievement? They administered a survey to the twins, 35 percent of whom were identical twins with the same DNA. The rest of the twins were fraternal with 50 percent genetic similarity, some same-sex twins and others twins of the opposite sex. The researchers assumed these twins had been raised together with similar upbringings and schooling.” (more)