Question

What is the primary cause of chromosomal disorders?

Options

• Numerical or structural change in chromosomes

• Mutation in a single gene

• Deterioration of mitochondrial DNA

• Viral infection of the nucleus

Answer 1

Chromosomal disorders are caused by numerical or structural changes in chromosomes, such as the loss or gain of an entire chromosome or portions thereof. These changes typically result from nondisjunction during cell division and are detected through karyotyping.