There is no single study that definitively confirms that intelligence is inherited primarily from the mother. However, some research has suggested that intelligence genes may be located on the X chromosome, which women have two copies of while men only have one. This has led to the hypothesis that mothers may have a greater influence on the inheritance of intelligence.
An article in The Independent cites a 1994 study from the University of Ulm in Germany, which suggests that intelligence genes are concentrated on the X chromosome. However, this study is not the only one and there is no definitive scientific consensus on the matter.
It is important to note that the inheritance of intelligence is a complex issue that is influenced by many factors, including genes from both parents, environment, upbringing, and life experiences. Therefore, while some studies suggest a greater maternal influence on the inheritance of intelligence due to the X chromosome, this is not an absolute truth and requires more research to fully understand the mechanisms of intelligence inheritance.
