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Human mating is dependent on the operational sex ratio. The local operational sex ratio has been shown to have an impact on mating strategies. [ 170 ] This is defined as the ratio of marriage-age males to marriage-age females, with a high ratio representing more males and a low ratio representing more females in the local area.
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 ...
Human mate choice, an aspect of sexual selection in humans, depends on a variety of factors, such as ecology, demography, access to resources, rank/social standing, genes, and parasite stress. While there are a few common mating systems seen among humans, the amount of variation in mating strategies is relatively large.
Human female mating competition is complex and multifaceted and varies across cultures, societies, and individuals. [94] Females may compete for high-quality mates who possess traits that indicate underlying genetic quality, possibly including physical attractiveness and intelligence, [ 95 ] or material resources that can enhance the survival ...
Human sexual reproduction, to produce offspring, begins with fertilization. Successful reproduction typically involves sexual intercourse between a healthy, sexually mature and fertile male and female. [1] During sexual intercourse, sperm cells are ejaculated into the vagina through the penis, resulting in fertilization of an ovum to form a ...
Sexual strategies theory (SST) is an evolutionary theory of human mating created by David Buss and David Schmitt in 1993. It defines the set of mating strategies that humans pursue, the adaptive problems that men and women face when pursuing these strategies, and the evolved solutions to these mating problems.
A mating system is a way in which a group is structured in relation to sexual behaviour. The precise meaning depends upon the context. With respect to animals, the term describes which males and females mate under which circumstances.
Assortative mating in humans has been widely observed and studied, and can be broken down into two types of human assortative mating. [13] These are: genetic assortative mating (assortative mating with mate choice based on genetic type and phenotypical expression); and