Which of the following is a characteristic of Pierre Robin sequence?

The characteristic of Pierre Robin sequence is micrognathia, which refers to an abnormally small jaw. This condition is central to the sequence and often results in other related issues, such as a cleft palate and airway obstruction. Micrognathia occurs due to developmental problems during early embryogenesis, affecting the lower jaw's growth.

While oligohydramnios (reduced amniotic fluid), amniotic bands (which can cause a range of congenital deformities), and advanced maternal age can be associated with various congenital conditions, they are not defining features of Pierre Robin sequence specifically. In contrast, micrognathia is a hallmark symptom of this sequence and is critical in its diagnosis and understanding.