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Cinderella Effect
In evolutionary psychology, the Cinderella effect describes the phenomenon of a higher incidence of child abuse and mistreatment by stepparents than biological parents. It takes its name from the fairy tale character Cinderella, a girl who is mistreated by her stepmother and stepsisters. Evolutionary psychologists describe this effect as being a byproduct of a bias towards biological family and a conflict between reproductive partners investing in young children that are unrelated to one partner. Background In the early 1970s, a theory arose on the connection between stepparents and child maltreatment. In 1973 forensic psychiatrist P. D. Scott summarized information on a sample of "fatal battered-baby cases" perpetrated in anger. 15 of the 29 murders he considered, or 52%, were committed by stepfathers.Daly & Wilson (1999), p. 33 Although initially there was no analysis of this raw data, empirical evidence has since been collected on what is now called the Cinderella effect th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cinderella (sports)
An underdog is a person or group in a competition, usually in sports and creative works, who is largely expected to lose. The party, team, or individual expected to win is called the favorite or top dog. In the case where an underdog wins, the outcome is an upset. An "underdog bet" is a bet on the underdog or outsider for which the odds are generally higher. The first recorded uses of the term occurred in the second half of the 19th century; its first meaning was "the beaten dog in a fight". In British and American culture, underdogs are highly regarded. This harkens back to core Judeo-Christian stories, such as that of David and Goliath, and also ancient British legends such as Robin Hood and King Arthur. This is also reflected in the idea of the American dream, where someone from a low social class can achieve success through hard work. Sports are another instance where underdogs are highly valorized, reflected in both real events, such as the Miracle on Ice, and in popul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supergene
A supergene is a chromosomal region encompassing multiple neighboring genes that are inherited together because of close genetic linkage, i.e. much less recombination than would normally be expected. This mode of inheritance can be due to genomic rearrangements between supergene variants. A supergene region can contain few, functionally related genes that clearly contribute to a shared phenotype. Phenotypes encoded by supergenes Supergenes have cis-effects due to multiple loci (which may be within a gene, or within a single gene's regulatory region), and tight linkage. They are classically polymorphic, whereby different supergene variants code for different phenotypes. Classic supergenes include many sex chromosomes, the ''Primula'' heterostyly locus, which controls " pin" and " thrum" types, and the locus controlling Batesian mimetic polymorphism in '' Papilio memnon'' butterflies. Recently discovered supergenes are responsible for complex phenotypes including color-m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Childlessness
Childlessness is the state of not having children. Childlessness may have personal, social or political significance. Childlessness, which may be by choice or circumstance, is distinguished from voluntary childlessness, also called being "childfree", which is voluntarily having no children, and from antinatalism, wherein childlessness is promoted. Types Types of childlessness can be classified into several categories: * ''natural sterility'' randomly affects individuals. One can think of it as the minimum level of permanent childlessness that we can observe in any given society, and is of the order of 2 percent, in line with data from the Hutterites, a group established as the demographic standard in the 1950s. * ''social sterility'', which one can also call poverty-driven childlessness, or endogenous sterility, describes the situation of poor women whose fecundity has been affected by poor living conditions. * people who are ''childless by circumstance''. These people can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adoption
Adoption is a process whereby a person assumes the parenting of another, usually a child, from that person's biological or legal parent or parents. Legal adoptions permanently transfer all rights and responsibilities, along with filiation, from the biological parents to the adoptive parents. Unlike guardianship or other systems designed for the care of the young, adoption is intended to effect a permanent change in status and as such requires societal recognition, either through legal or religious sanction. Historically, some societies have enacted specific laws governing adoption, while others used less formal means (notably contracts that specified inheritance rights and parental responsibilities without an accompanying transfer of filiation). Modern systems of adoption, arising in the 20th century, tend to be governed by comprehensive statutes and regulations. History Antiquity Adoption for the well-born While the modern form of adoption emerged in the United States, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Child Murder
Pedicide, also known as child murder, child manslaughter or child homicide, is the homicide of an individual who is a Age of majority, minor. In many legal jurisdictions, it is considered an Aggravation (law), aggravated form of homicide. The age of the victim may constitute an aggravated factor for homicide offenses, or child murder may be a stand-alone criminal offense. Punishment by jurisdiction United States In 2008, there were 1,494 pedicides in the United States. Of those killed, 1,035 were male and 452 were female. About half of the states that maintain the Capital punishment in the United States, death penalty have included pedicide to their list of aggravating factors that may make a murder punishable by death. The victim's age under which the crime is a capital crime varies between states. The ages are set between 10 and 17, with 12 being the most common age. Child manslaughter can result in an aggravated charge in some jurisdictions such as in the State of Flori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estrous Cycle
The estrous cycle (, originally ) is a set of recurring physiological changes induced by reproductive hormones in females of mammalian subclass Theria. Estrous cycles start after sexual maturity in females and are interrupted by anestrous phases, otherwise known as "rest" phases, or by pregnancies. Typically, estrous cycles repeat until death. These cycles are widely variable in duration and frequency depending on the species.Bronson, F. H., 1989. Mammalian Reproductive Biology. University of Chicago Press, Chicago, IL, USA. Some animals may display bloody vaginal discharge, often mistaken for menstruation. Many mammals used in commercial agriculture, such as cattle and sheep, may have their estrous cycles artificially controlled with hormonal medications for optimum productivity. The male equivalent, seen primarily in ruminants, is called rut. Differences from the menstrual cycle Mammals share the same reproductive system, including the regulatory hypothalamic system that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Competition (biology)
Competition is an Biological interaction, interaction between organisms or species in which both require one or more Resource (biological), resources that are in Limiting factor, limited supply (such as food, water, or Territory (animal), territory). Competition lowers the Fitness (biology), fitness of both organisms involved since the presence of one of the organisms always reduces the amount of the resource available to the other. In the study of community ecology, competition within and between members of a species is an important biological interaction. Competition is one of many interacting Biotic component, biotic and Abiotic component, abiotic factors that affect Community (ecology), community structure, species diversity, and population dynamics (shifts in a population over time). There are three major Mechanism (biology), mechanisms of competition: interference, exploitation, and apparent competition (in order from most direct to least direct). Interference and exploitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infanticide
Infanticide (or infant homicide) is the intentional killing of infants or offspring. Infanticide was a widespread practice throughout human history that was mainly used to dispose of unwanted children, its main purpose being the prevention of resources being spent on weak or disabled offspring. Unwanted infants were usually abandoned to die of exposure, but in some societies they were deliberately killed. Infanticide is generally illegal, but in some places the practice is tolerated, or the prohibition is not strictly enforced. Most Stone Age human societies routinely practiced infanticide, and estimates of children killed by infanticide in the Mesolithic and Neolithic eras vary from 15 to 50 percent. Infanticide continued to be common in most societies after the historical era began, including ancient Greece, Roman Empire, ancient Rome, the Phoenicians, ancient China, ancient Japan, Pre-Islamic Arabia, early modern Europe, Aboriginal Australians, Aboriginal Australia, Indigenous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolutionary Biology
Evolutionary biology is the subfield of biology that studies the evolutionary processes such as natural selection, common descent, and speciation that produced the diversity of life on Earth. In the 1930s, the discipline of evolutionary biology emerged through what Julian Huxley called the Modern synthesis (20th century), modern synthesis of understanding, from previously unrelated fields of biological research, such as genetics and ecology, systematics, and paleontology. The investigational range of current research has widened to encompass the genetic architecture of adaptation, molecular evolution, and the different forces that contribute to evolution, such as sexual selection, genetic drift, and biogeography. The newer field of evolutionary developmental biology ("evo-devo") investigates how embryogenesis is controlled, thus yielding a wider synthesis that integrates developmental biology with the fields of study covered by the earlier evolutionary synthesis. Subfields ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mating
In biology, mating is the pairing of either opposite-sex or hermaphroditic organisms for the purposes of sexual reproduction. ''Fertilization'' is the fusion of two gametes. '' Copulation'' is the union of the sex organs of two sexually reproducing animals for insemination and subsequent internal fertilization. Mating may also lead to external fertilization, as seen in amphibians, fishes and plants. For most species, mating is between two individuals of opposite sexes. However, for some hermaphroditic species, copulation is not required because the parent organism is capable of self-fertilization (autogamy); for example, banana slugs. The term ''mating'' is also applied to related processes in bacteria, archaea and viruses. Mating in these cases involves the pairing of individuals, accompanied by the pairing of their homologous chromosomes and then exchange of genomic information leading to formation of recombinant progeny (see mating systems). Animals For animals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parental Investment
Parental investment, in evolutionary biology and evolutionary psychology, is any parental expenditure (e.g. time, energy, resources) that benefits offspring.Clutton-Brock, T.H. 1991. ''The Evolution of Parental Care''. Princeton, NJ: Princeton U. Press. pg. 9Trivers, R.L. (1972). Parental investment and sexual selection. In B. Campbell (Ed.), ''Sexual selection and the descent of man'', 1871-1971 (pp. 136–179). Chicago, IL: Aldine. . Parental investment may be performed by both males and females (called ''biparental care''), females alone (''exclusive maternal care'') or males alone (''exclusive paternal care''). Care can be provided at any stage of the offspring's life, from pre-natal (e.g. egg guarding and Egg incubation, incubation in birds, and placental nourishment in mammals) to post-natal (e.g. food provisioning and protection of offspring). Parental investment theory, a term coined by Robert Trivers in 1972, predicts that the sex that invests more in its offsprin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Humane Association
The American Humane Society (previously American Humane), is an American animal welfare organization founded in 1877 that works to rescue, care for, and protect animals by taking action wherever and whenever they are in need. It was previously called the International Humane Association and subsequently the American Humane Association and American Humane before changing its name to American Humane Society in 2025. In 1940, it became the sole monitoring body for the humane treatment of animals on the sets of unionized Hollywood films and other broadcast productions, a role it maintains through an agreement with the Screen Actors Guild. American Humane Society is best known for its certification mark "No Animals Were Harmed", which appears at the end of film or television credits where animals are featured. The organization also rescues animals following natural disasters, reunites retired Military Working Dogs with their former handlers, and celebrates pups who do extraordinary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
