Final answer:
The studies of adopted children and their families show that genetic influences on intelligence become more apparent with age.
Step-by-step explanation:
The studies of adopted children and their biological and adoptive families suggest that as they age, genetic influences on intelligence become more apparent. These studies involve comparing the intelligence of adopted children with their biological and adoptive families. The findings indicate that genetic factors play a significant role in determining intelligence. These findings underscore the intricate interplay between nature and nurture, highlighting how genetic predispositions subtly assert their influence on intelligence as individuals traverse the developmental trajectory, offering valuable insights into the multifaceted dynamics shaping human cognition.