AP BIOLOGY

Detailed explanation-1: -It is one of the final phases of genetic recombination, which occurs in the pachytene stage of prophase I of meiosis during a process called synapsis.

Detailed explanation-2: -Crossing Over Crossing over, as related to genetics and genomics, refers to the exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).

Detailed explanation-3: -Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA.

Detailed explanation-4: -Explanation: The crossing over of homologous chromosomes occurs in prophase I of meiosis. Prophase I of meiosis is characterized by the lining up of homologous chromosomes close together to form a structure known as a tetrad.

Detailed explanation-5: -Prophase: In this stage, homologous chromosomes pair up to form tetrads . The formation of tetrads is also called synapsis. Something very important about tetrads is that they enable the homologous chromosomes to exchange segments of DNA, a process called crossing over .