<em>They differ from both parents and also from each other. This occurs through a number of mechanisms, including crossing-over, the independent assortment of chromosomes during anaphase I, and random fertilization. When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur.</em>
It's a cell wall, common to some types of cells, like plant cells (one notable component of the cell wall is <span>cellulose, which is exactly where we obtain it from</span>).
