egrep (which is the same as grep -E) treats +, ?, |, (, and ) as meta-characters. In basic regular expressions (with grep), the meta-characters ?, +, {, |, (, and ) lose their special meaning. If you want grep to treat these characters as meta-characters, escape them \?, \+, \{, \|, \(, and \).
Plants, fungi, and some protists also perform meiosis. In plants, meiosis creates a multicellular haploid organism, called a gametophyte , which in some groups is independent of the diploid plant. Gametes are produced by mitosis of the gametophyte, which then fuse to form the embryo. This cycle is called alternation of generations. Meiosis involves two divisions.
The process that creates haploid cells is called meiosis. Mitosis vs. Meiosis. The process that creates haploid cells is called meiosis. The process that creates diploid cells is called mitosis. A comparison of mitosis and meiosis can beseen in the next slide. Mitosis. Meiosis. Genetic Variation. There are four main sources of variability in sexually reproducing organisms.