Mitosis
Videos
Mitosis is a part of the cell cycle in eukaryotic cells in which replicated chromosomes are separated into two new nuclei. Cell division by mitosis is an equational division which gives rise to geneti
Interphase nucleus (left), condensing chromosomes (middle) and condensed chromosomes (right)
A cell in late metaphase. All chromosomes (blue) but one have arrived at the metaphase plate.
Ciliate undergoing cytokinesis, with the cleavage furrow being clearly visible
An abnormal (tripolar) mitosis (12 o'clock position) in a precancerous lesion of the stomach (H&E stain)
Meiosis
Videos
Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes, the sperm or egg cells. It involves two rounds of division that ultimately result
A diagram depicting nondisjunction in the maternal cell during the Meiosis I phase, resulting in gametes with an extra chromosome. Through fertilization of this egg, an offspring with the condition trisomy 21 is produced.
