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A secondary sex characteristic is a physical characteristic of an organism that is related to or derived from its sex, but not directly part of its reproductive system. [1] In humans , these characteristics typically start to appear during puberty —and include enlarged breasts and widened hips of females, facial hair and Adam's apples on ...
In psychology, trait theory (also called dispositional theory) is an approach to the study of human personality. Trait theorists are primarily interested in the measurement of traits , which can be defined as habitual patterns of behavior, thought , and emotion . [ 1 ]
Secondary traits are characteristics seen only in certain circumstances (such as particular likes or dislikes that a very close friend may know). They must be included to provide a complete picture of human complexity. Overall, Allport's three-level hierarchy of traits provides a framework for understanding the different levels of traits that ...
Sexual characteristics are physical traits of an organism (typically of a sexually dimorphic organism) which are indicative of or resultant from biological sexual factors. These include both primary sex characteristics , such as gonads , and secondary sex characteristics .
This means that even if the trait causes males to die earlier, the trait is still beneficial so long as males with the trait produce more offspring than males lacking the trait. This balance keeps dimorphism alive in these species and ensures that the next generation of successful males will also display these traits that are attractive to females.
The biological basis of personality is a collection of brain systems and mechanisms that underlie human personality. Human neurobiology, especially as it relates to complex traits and behaviors, is not well understood, but research into the neuroanatomical and functional underpinnings of personality are an active field of research.
The handicap principle was proposed in 1975 by the Israeli biologist Amotz Zahavi.He argued that mate choice involving what he called "signal selection" would lead to "honest" or reliable signalling between male and female animals, even though they have an interest in bluffing or deceiving each other.
Such traits, particularly body fat distribution, may represent sexual ornamentation, which is important in mating throughout the animal kingdom, for example, in birds. [ 113 ] [ 114 ] Humans also use bodily decoration, including jewelry, tattoos, scarification, and makeup to enhance appearance and desirability to potential mates.