Crossing over would most likely occur during which stage of the cell cycle?

when DNA is being replicated

when homologous chromosomes line up in pairs

when centromeres are separated

when cytokinesis begins

When homologous chromosomes line up in pairs.

rocks and weathering-matching

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.