Question

what is crossing over?

• when paired chromosomes exchange genetic information
• the phase of the cell cycle where a cell actively divides into two identical cells
• when chromosomes fail to separate properly during meiosis
• the process of creating specialized cells for the purpose of reproduction

Explanation:

Crossing over occurs during meiosis. It specifically involves paired chromosomes (homologous chromosomes) exchanging genetic material. This process increases genetic diversity.
The second option describes mitosis (a type of cell division where a cell divides into two identical cells). The third option describes nondisjunction (chromosomes not separating properly during meiosis). The fourth option describes gametogenesis (the process of creating specialized reproductive cells).

Answer:

When paired chromosomes exchange genetic information