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Parthenogenesis is the type of asexual reproduction involving the development of female gametes without any fertilisation. Animals such as bees, wasps, ants have no sex chromosomes. These organisms reproduce by parthenogenesis. A few plants, reptiles and fish are also capable of reproducing in this manner. A few organisms such as crayfish, snakes, komodo dragons and sharks can reproduce sexually as well as by parthenogenesis. This is known as facultative parthenogenesis. In certain animals, parthenogenesis occurs naturally in their life cycles. This is known as natural parthenogenesis. The fertilised eggs might sometimes develop parthenogenetically by various chemical and physical means. This is known as artificial parthenogenesis. Parthenogenesis helps in determining the sex of an individual in honey bees, wasps, etc. It supports the chromosomal theory of inheritance. Variations from populations are eliminated by parthenogenesis. It is the simplest, most stable and easy process of reproduction. Polyploidy in organisms is caused by parthenogenesis. It helps in the development of advantageous mutant characters. Non-adaptive combination of genes is controlled. There are no sterile races.