The book outlines how an extra Y chromosome leads to Jacob’s syndrome, also called XYY syndrome, YY syndrome, or 47XYY. It explains the role of chromosomes, genes, and mutations, along with the processes of meiosis, nondisjunction, and aneuploidy.
Key topics include symptoms such as tall stature, macrodontia, macrocephaly, pes planus, hypertelorism, clinodactyly, learning disabilities, dyslexia, tremors, and behavioral difficulties. Complications such as hypotonia, scoliosis, and attention deficit hyperactivity disorder are also addressed.
The text covers diagnosis through chromosome analysis, karyotyping, amniocentesis, and chorionic villus sampling. Treatment options include speech, physical, and educational therapy, with supportive care to address learning and developmental challenges.
This book will interest students, health science learners, and those studying genetics who want to understand Jacob’s syndrome, its symptoms, and its management.