ZW sex-determination system
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The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds, some fish and crustaceans such as the giant river prawn, some insects, the Schistosomatidae famil
ZW sex determination in birds (as exemplified with chickens)
Mice X Y chromosomes
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
ZW sex-determination system
…Python families are now known to probably have an XY sex-determination system. Interest in looking into this came from female family members capable of parthenogenesis, or producing offspring without mating. In 2010 a female Boa constrictor that produced 22 female offspring in this manner was found in the wild. By…
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