Final answer:
Angelman syndrome is a genetic condition characterized by seizures, strabismus, and sociable with episodic laughter. It is caused by an allelic anomaly on chromosome 15.
Step-by-step explanation:
The symptoms described in the question, including seizures, strabismus, and sociability with episodic laughter, are characteristic of a condition called Angelman syndrome. Angelman syndrome is caused by a genetic anomaly known as an allelic anomaly. This anomaly occurs when there is a mutation or deletion of a specific gene on chromosome 15.
Individuals with Angelman syndrome typically have severe developmental delays, intellectual disability, and speech impairments. They often exhibit a happy and sociable demeanor, with frequent episodes of laughter. The seizures and strabismus mentioned in the diagnosis are common features of the syndrome.
Diagnosing Angelman syndrome involves a combination of clinical evaluations, genetic testing, and examination of the individual's medical history. It is important to consult with a healthcare professional for a proper diagnosis and management of the condition.