Which condition is associated with trisomy 13?

Which condition is associated with trisomy 13?

• A. Microcephaly
• B. Down syndrome
• C. Edward syndrome
• D. Turner syndrome

Answer: (A)

Trisomy 13, also known as Patau syndrome, is characterized by multiple congenital anomalies, including severe intellectual disability, and notable physical malformations. One of the common features seen in individuals with trisomy 13 is microcephaly, which is an abnormally small head circumference often indicating associated brain development issues.

Microcephaly can be attributed to the abnormal growth and development of the fetal brain, which is impacted by the genetic anomalies present in trisomy 13. Therefore, recognizing microcephaly as a trait associated with this condition helps in understanding the broader spectrum of developmental challenges that individuals with trisomy 13 may face.

The other conditions listed, such as Down syndrome, Edward syndrome, and Turner syndrome, are associated with different chromosomal abnormalities and features that do not relate to trisomy 13 specifically. For instance, Down syndrome is associated with trisomy 21, Edward syndrome with trisomy 18, and Turner syndrome involves a single X chromosome. Each of these syndromes carries its own distinct characteristics that differentiate them from trisomy 13.