20th February 2024

A 19-year-old man presents with a BMI of 40. His parents note that he was floppy as a child and initially did not feed well

A 19-year-old man presents with a BMI of 40. His parents note that he was floppy as a child and initially did not feed well, with delayed motor milestones. They said that he always had an enormous appetite once he was in his childhood, and they had difficulty controlling his diet. He also regularly attends a psychiatrist due to significant behavioural issues.

Given the underlying diagnosis, what chromosomal abnormality has led to his condition?

Select the SINGLE most appropriate option from the list below. Select ONE option only.