Options:
A.
B.
C.
D.
Sign in to view the correct answer and detailed explanation.
Study with fewer interruptions on Android
Use Ulearngo on a verified device for smoother past-question study.
Ulearngo is an independent study app. It is not affiliated with, endorsed by, or representing Obafemi Awolowo University (OAU). Always confirm official exam, admission, registration, syllabus, timetable, and result information from OAU admissions.
Earlier discussion
2 older comments kept for context.
Onome Racheal
The abnormal cell division which result in extra or full copy of chromosome 13 is patau syndrome, of chromosome 18 is Edward syndrome and of chromosome 47 is klinefelter syndrome
Emiola
Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome.
Down syndrome varies in severity among individuals, causing lifelong intellectual disability and developmental delays. It's the most common genetic chromosomal disorder and cause of learning disabilities in children. It also commonly causes other medical abnormalities, including heart and gastrointestinal disorders.