Thanks for your query.
Jacob’s syndrome is characterized by an extra copy of the Y chromosome
in each of a male's cells.
Males with this condition usually have normal sexual development and are able to father children.
Signs and symptoms vary widely among affected males and may include being taller than average; an increased risk of learning disabilities and delayed speech and language skills and behavioral and emotional difficulties.
A small percentage of males with 47, XYY syndrome
are diagnosed with autism spectrum
Most cases are not inherited.
I would advise you please find a medical geneticist or genetic counsellor in your area.
Help from child psychologist
or educational psychologist would be valuable.
Hope you found the information useful.