Question

1 multiple choice 1 point what is nondisjunction? when a chromosome segment breaks off and attaches to another chromosome. when a chromosome segment is flipped in reverse order. when chromosomes fail to separate properly during meiosis. when a chromosome segment is copied twice.

Explanation:

Nondisjunction is a biological - genetic phenomenon. It occurs when chromosomes do not separate correctly during meiosis, leading to abnormal chromosome numbers in daughter cells. The first option describes translocation, the second describes inversion, and the fourth describes duplication.

Answer:

When chromosomes fail to separate properly during meiosis.