Final answer:
The number of genes involved in having a high IQ is not determined; intelligence is influenced by multiple genes and their interplay with environmental factors. Genetic predispositions and environmental circumstances both significantly impact the development of intelligence and IQ scores.
Step-by-step explanation:
The question of how many genes are involved in having a high IQ is complex and currently, scientists do not have a precise number. Intelligence is recognized as a multifactorial trait, meaning it's influenced by many different genes and their interactions with environmental factors. Studies such as the work on identical twins reared apart, like the Minnesota Study of Twins Reared Apart, indicate a strong genetic component to intelligence. However, pinpointing specific genes is challenging due to the intricate ways in which genes can affect brain development and function. While studies have shown certain genetic markers to be associated with intelligence, the exact number of genes involved remains unclear.
Adding to the complexity, the environment plays a significant role in shaping intelligence. Educational and social experiences, access to resources, and exposure to stress can all influence how genetic potential for intelligence is expressed. Findings from studies like those conducted by Mark Kishiyama suggest that socioeconomic factors and the associated stresses can impact cognitive performance and brain function, potentially affecting IQ scores.
As such, intelligence, and by extension high IQ, cannot be attributed to a simple count of specific genes. Both genetic and environmental components are crucial, and their interaction is what ultimately influences an individual's intelligence.