AP BIOLOGY

Detailed explanation-1: -In prophase I of meiosis, the homologous chromosomes form the tetrads. In metaphase I, these pairs line up at the midway point between the two poles of the cell to form the metaphase plate.

Detailed explanation-2: -Prophase I: The nuclear envelope breaks down. The chromatin condenses into chromosomes. Homologous chromosomes containing the two chromatids come together to form tetrads, joining at their centromeres (2n 4c). This is when “crossing over” occurs, which creates genetic variation.

Detailed explanation-3: -During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent.

Detailed explanation-4: -MEIOSIS I: 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 .

Detailed explanation-5: -During meiosis, homologous chromosomes pair up and separate. Homologous chromosomes do not function the same in mitosis as they do in meiosis. Prior to every single mitotic division, a cell undergoes, the DNA in the parent cell replicate themselves.