Final answer:
In newborn assessment, low-set ears can suggest a chromosomal disorder. Epstein's pearls, gynecomastia, and the Babinski reflex are not typically associated with genetic abnormalities. The Apgar score, which assesses newborn health, does not directly signify chromosomal disorders.
Step-by-step explanation:
Low-set ears are the finding that would most suggest a chromosomal disorder in a newborn. Among the options provided, Epstein's pearls, gynecomastia, and the Babinski reflex are typically normal findings or transient conditions in newborn infants, whereas low-set ears can be a marker for genetic conditions such as Down syndrome, Turner syndrome, and other chromosomal anomalies. The Babinski reflex is a normal reflex in infants which is indicative of proper neural function. Epstein's pearls are small cysts that can be found on the gums and roof of the mouth in newborns, and are not associated with chromosomal disorders. Gynecomastia is the enlargement of breast tissue, which may occasionally be seen in newborns due to maternal hormones but is not specifically indicative of a genetic condition.
The Apgar test, indirectly mentioned in the context of newborn assessment, is not directly relevant to identifying chromosomal disorders but is part of a broader neonatal assessment to gauge a newborn's health status right after birth. This test checks vital criteria such as skin color, heart rate, reflexes, muscle tone, and respiration. Each criterion is assigned a score of 0, 1, or 2, with higher scores indicating a better transition from the womb.