Topic: Genetics

Scientists discovered a rare genetic growth disorder in two people who lived over 12,000 years ago. They used ancient DNA testing and modern medical data to diagnose the condition.

An international team of researchers found a surprising answer to a long-standing question about two skeletons buried together in southern Italy. The pair was discovered in 1963 at Grotta del Romito, a famous Upper Paleolithic burial site. For decades, scientists wondered how the two individuals were related and whether a medical condition explained their short stature.

The team extracted ancient DNA from the petrous portion of the temporal bone in both skeletons. The results showed that the two were first-degree relatives, likely a mother and daughter. Genetic testing revealed that both individuals were female.

The researchers found a rare inherited growth disorder called acromesomelic dysplasia in Romito 2, who was about 110 cm tall. Romito 1 was also shorter than average at roughly 145 cm tall. The team discovered that Romito 1 carried a single altered copy of the same gene, which explained her milder short stature.

This study demonstrates how paleogenomics can now trace ancient population history and pinpoint rare genetic diseases in prehistoric humans.

Why It Matters

Understanding human history helps us recognize and treat rare genetic conditions today. This discovery also shows that social care was present even in the Ice Age, as Romito 2 lived into adolescence or adulthood despite her physical challenges.

Key Facts

• The study found a rare inherited growth disorder called acromesomelic dysplasia in two individuals who lived over 12,000 years ago.
• The pair was likely a mother and daughter, as they were first-degree relatives.
• Romito 2 was about 110 cm tall, while Romito 1 was roughly 145 cm tall.
• The study used ancient DNA testing and modern medical data to diagnose the condition.
• The findings demonstrate how paleogenomics can trace ancient population history and pinpoint rare genetic diseases in prehistoric humans.

Key Terms

Acromesomelic dysplasia

A rare inherited growth disorder characterized by severe short stature and significant shortening of the limbs.

Implications

Understanding human history helps us recognize and treat rare genetic conditions today. This discovery also shows that social care was present even in the Ice Age, as Romito 2 lived into adolescence or adulthood despite her physical challenges.