Question

When an individual gets an extra chromosome from a parent, the resulting condition is called ________.

• A. Disjunction
• B. Nondisjunction
• C. Aneuploidy
• D. Polyploidy

Answer 1

The correct option is C

Aneuploidy

A condition where an individual gets an extra chromosome from the parent is called aneuploidy. These cases usually arise due to the nondisjunction of chromosome during the gamete formation. Down's syndrome is an example of aneuploidy where an extra copy of chromosome 21 is present.