sexual dimorphism


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Related to sexual dimorphism: sexual selection, Stabilizing selection

dimorphism

 [di-mor´fizm]
the quality of existing in two distinct forms. adj., adj dimor´phic, dimor´phous.
sexual dimorphism physical or behavioral differences associated with sex.
having some properties of both sexes, as in the early embryo and in some hermaphrodites.

sex·u·al di·mor·phism

the somatic differences within species between male and female individuals that arise as a consequence of sexual maturation; inclusive of, but not restricted to, the secondary sexual characteristics.
A physical dichotomy between males and females of a particular species

sex·u·al di·morph·ism

(sek'shū-ăl dī-mōr'fizm)
The somatic differences within species between male and female individuals that arise as a consequence of sexual maturation, including, but not restricted to, the secondary sexual characters.

sexual dimorphism

the presence in a population of two sexes each with a different PHENOTYPE, a classic example of a GENETIC POLYMORPHISM. The underlying mechanism varies in different organisms, but is often controlled by genes on special SEX CHROMOSOMES (see SEX DETERMINATION).

sex·u·al di·morph·ism

(sek'shū-ăl dī-mōr'fizm)
Somatic differences within species between male and female individuals that arise as a consequence of sexual maturation.

dimorphism

the quality of existing in two distinct forms.

sexual dimorphism
1. physical or behavioral differences associated with sex; males and females of the same species are different in appearance.
2. having some properties of both sexes, as in the early embryo and in some hermaphrodites.

sexual

pertaining to sex.

sexual behavior
includes masturbation, courtship, mating, estral display.
sexual cycle
estral cycle.
sexual differentiation
identification of the sex of a patient is done usually by an examination of external genitalia; preparation and examination of a karyotype is the preferred laboratory method.
sexual dimorphism
differences in structure or physical characteristics between males and females of the same species, e.g. horns in some breeds of sheep, feather coat color in many species of birds.
sexual intercourse
see mating.
sexual maturity
capable of mating. Occurs at different ages in different species and in different races and even breeds.
sexual receptivity
behavioral changes in female animals at the time of estrus; involves acceptance of male efforts at copulation and, in some species, actively seeking the male.
sexual rest
circumstances in which no sexual intercourse takes place.
References in periodicals archive ?
2014: Sexual dimorphism and body condition of wintering white-rumped sandpipers in southern Brazil.
Thus, rural communities are predicted to display greater levels of sexual dimorphism in lower limb rigidity than the urban sample.
The influence of sexual dimorphism in body size and mouth morphology on diet selection and sexual segregation in cervids.
To determine if the degree of sexual dimorphism in each skull feature varied among localities, we used a two-way analysis of variance (ANOVA) for each character.
Reversed sexual dimorphism in Tawny Owls, Strix aluco, correlates with duty division in breeding effort.
Reliability of sexual dimorphism depends on magnitude of sexual dimorphism exhibited in a population, availability of skeletal elements, anatomical areas of the bone preserved and degree of preservation.
Sexual dimorphism and discriminant function sexing in indigenous South African Crania Homo 2005; 55: 213-28.
While we previously demonstrated the male-dominant sexual dimorphism of the spinal GRP system which plays an important role in the male reproductive function in adult rats, (12) little is known about the developmental changes in the spinal center during ontogeny.
Studies focused on length-weight relationships reveal that sexual dimorphism is common in freshwater crayfish species (Lindquist & Lahti 1983; Holdich 2001; Mazlum et al.
Sexual dimorphism may be an evolutionary adaptative mechanism favouring sexual selection, acting on males when females for choosing partners for mating and in mate competition, enhancing selection towards certain male traits (Hedrick & Temeles, 1989).
Reduction behavior of phenotypic correlations and phenotypic ratios owing to the aging of the animals indicate that the prolongation of the culture period enhances phenotypic differences between males and females, with an underscoring of sexual dimorphism as previously reported by Bhatta et al.
Sexual dimorphism is common among vertebrates (Kajiura et al.