Parthenogenesis
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Parthenogenesis is a natural form of asexual reproduction in which the embryo develops directly without need for fertilization. In animals, parthenogenesis means the development of an embryo from an u
The asexual, all-female whiptail species Aspidoscelis neomexicanus (center), which reproduces via parthenogenesis, is shown flanked by two sexual species having males, A. inornatus (left) and A. tigris (right), which naturally hybridized to form A. neomexicanus.
A young Komodo dragon, Varanus komodoensis, produced through parthenogenesis. Komodo dragons can produce offspring through both sexual reproduction and parthenogenesis.
Induction of parthenogenesis in pigs
Meiosis
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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.
