AP BIOLOGY

Detailed explanation-1: -The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads.

Detailed explanation-2: -In meiosis, there are two rounds of nuclear division resulting in four nuclei and usually four daughter cells, each with half the number of chromosomes as the parent cell. The first separates homologs, and the second-like mitosis-separates chromatids into individual chromosomes.

Detailed explanation-3: -The chiasma is a structure that forms between a pair of homologous chromosomes by crossover recombination and physically links the homologous chromosomes during meiosis.

Detailed explanation-4: -Metaphase I The bivalents line up at the equator. Random orientation occurs and is a significant source of genetic variation.