A Nonreciprocal Crossover Causes Which of the Following Products

Question

A nonreciprocal crossover causes which of the following products?
A) deletion only
B) duplication only
C) nondisjunction
D) deletion and duplication
E) duplication and nondisjunction

Accepted Answer

A nonreciprocal crossover results in one chromosome receiving an extra copy of a certain region while the other loses that region. This means that the product will have both a deletion and a duplication.