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.
â¢ Haploid cells are produced by meiosis, and diploid cells are produced by mitosis. â¢ Diploid cells have the same number of chromosomes as the parent cell, and haploid cells have only a half of the number of chromosomes as the parent cell.ince each gamete has only one set of chromosomes, the end resulting zygote will have only two sets of chromosomes. That is the zygote becomes diploid. If the gametes were not haploid cells, the result at the end would be a zygote with four sets of chromosomes.