NATS 1675 Lecture Notes - Lecture 6: Meiosis, Cell Division, Gametogenesis
6 Feb 2018
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Mitosis- kind of cell division in which two identical cells are produced. It is used as one method of reproduction for single celled microorganisms such as protests and bacteria. type of cell division that occurs in multicellular organisms for growth, repair and replacement. Making exact copy of self as soon as egg fertilized by sperm, mitosis occurs. Meiosis a process of cell division by which gametes containing half the normal number of chromosomes are produced. Meiosis is also called reduction division (cutting chromosomes) 46 chromosomes (meiosis all about cutting the number of chromosomes in half) Gametes (unisex) sex cells, e. g. , egg cells, sperm cells, pollen grains. Chromosome a strand of dna and protein found in the nucleus of a cell; carries genetic information. In humans there are 46 chromosomes or 23 pairs. Chromosome pairs 1-22 called autosomes (cid:894)(cid:1005) fro(cid:373) group (cid:1005), (cid:1006), (cid:1007), (cid:272)a(cid:373)e fro(cid:373) (cid:373)other, o(cid:374)e fro(cid:373) father), all are the same whether a girl or boy.
