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Parthenogenesis is a mode of asexual reproduction in which offspring are produced by females without the genetic contribution of a male. Among all the sexual vertebrates, the only examples of true parthenogenesis, in which all-female populations reproduce without the involvement of males, are found in squamate reptiles (snakes and lizards). [1]
Females also gain nutrients from sperm storage so the more a female mates with different males the more nutritional access she will obtain. [40] After copulation, some female lizard species chose the sex of their offspring based on the male's sperm. Females produce sons with sperm from larger sires, and daughters from sperm with smaller sires. [41]
Male genitalia of Lepidoptera Female genitalia of Lepidoptera. The study of the genitalia of Lepidoptera is important for Lepidoptera taxonomy in addition to development, anatomy and natural history. The genitalia are complex and provide the basis for species discrimination in most families and also in family identification. [1]
The desert grassland whiptail lizard (Aspidoscelis uniparens) is an all-female species of reptiles in North America. It was formerly placed in the genus Cnemidophorus. A common predator of the whiptail lizard is the leopard lizard that preys on A. uniparens by using ambush and stalk hunting tactics. [2] [3] [4] These reptiles reproduce by ...
The reproductive developmental process whose specific outcome is the progression of the uterus over time, from its formation to the mature structure. uterine benign neoplasm: Human disease uterine disease: female reproductive system disease that is located in the uterus epithelioid trophoblastic tumor: Human disease uterus carcinoma in situ ...
The clitoris (/ ˈ k l ɪ t ər ɪ s / ⓘ or / k l ɪ ˈ t ɔːr ɪ s / ⓘ; pl.: clitorises or clitorides) is a female sex organ present in mammals, ostriches and other amniotes.. Although the clitoris exists in all mammal species, [1] [2] [3] most studies deal with the human clitoris - few detailed studies of the anatomy of the clitoris in non-humans exist. [4]
The New Mexico whiptail (Aspidoscelis neomexicanus) is a female-only species of lizard found in New Mexico and Arizona in the southwestern United States, and in Chihuahua in northern Mexico. It is the official state reptile of New Mexico. [2] It is one of many lizard species known to be parthenogenetic.
The human female reproductive system is made up of the internal and external sex organs that function in the reproduction of new offspring. The reproductive system is immature at birth and develops at puberty to be able to release matured ova from the ovaries , facilitate their fertilization , and create a protective environment for the ...