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Parthenogenesis (/ ˌ p ɑːr θ ɪ n oʊ ˈ dʒ ɛ n ɪ s ɪ s,-θ ɪ n ə-/; [1] [2] from the Greek παρθένος, parthénos, 'virgin' + γένεσις, génesis, 'creation' [3]) is a natural form of asexual reproduction in which the embryo develops directly from an egg without need for fertilization.
In that view, many human artifacts could be considered subject to sexual selection as part of the extended phenotype, for instance clothing that enhances sexually selected traits. [2] During human evolution, on at least two occasions, hominid brain size increased rapidly over a short period of time followed by a period of stasis.
Impregnation fetishism, commonly known as a breeding kink, is the experience of intense sexual attraction at the thought of being impregnated or impregnating someone. This means a person wanting to ejaculate inside their partner or to be ejaculated into without any birth control .
Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically. [1] By analogy, the term is used in human reproduction , but more commonly refers to the genetic disorders and other consequences that may arise from expression of deleterious recessive traits resulting from ...
Silkworms have since been breed by villagers along the banks of the Mekong and Bassak rivers as early as the 13th century. [10] There are three important silk textiles in Cambodia : (1) the ikat silks ( chong kiet in Khmer), or hol; (2) the twill-patterned silks; and (3) the weft ikat textiles.
This is an accepted version of this page This is the latest accepted revision, reviewed on 10 February 2025. Procreative biological processes of humanity Part of a series on Sex Biological terms Sexual dimorphism Sexual differentiation Feminization Virilization Sex-determination system XY XO ZW ZO Temperature-dependent Haplodiploidy Heterogametic sex Homogametic sex Sex chromosome X chromosome ...
No method is perfect, giving rise to questions about the completeness and consistency of the inbreeding avoidance hypothesis. [38] [39] Although the first option, individual behavioral observation, is preferred and most widely used, there is still debate over whether it can provide definitive evidence for inbreeding avoidance.
A 2010 study published in Molecular Biology and Evolution indicates that the habitual wearing of clothing began at some point in time between 83,000 years ago and 170,000 years ago based upon a genetic analysis indicating when clothing lice diverged from their head louse ancestors. This information suggests that the use of clothing likely ...