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The normal human karyotypes contain 21 pairs of autosomal chromosomes and one pair of sex chromosomes. Normally karyotypes for men have both an X and a Y chromosome denoted 46,XY.

Illnesses

In general, men suffer from many of the same illnesses as women. In comparison to women, men suffer from more illnesses - for example, prostate cancer is a type of cancer that only men can get - and have a significantly lower life expectancy.

Sexual characteristics

In humans, the sex of an individual is generally determined at the time of fertilization by the genetic material carried in the sperm cell. If a sperm cell carrying an X chromosome fertilizes the egg, the offspring will typically be female (XX); if a sperm cell carrying a Y chromosome fertilizes the egg, the offspring will typically be male (XY). This is referred to as the XY sex-determination system and is typical of most mammals, but quite a few other sex-determination systems exist, including some that are non-genetic. The term primary sexual characteristics denotes the kind of gamete the gonad produces: The ovary produces egg cells in the female, and the testis produces sperm cells in the male. The term secondary sexual characteristics denotes all other sexual distinctions that play indirect roles in uniting sperm and eggs. Secondary sexual characteristics include everything from the specialized male and female features of the genital tract, to the brilliant plumage of male birds or facial hair of humans, to behavioral features such as courtship.

Sex hormones

In mammals, the hormones that influence sexual differentiation and development are androgens (mainly testosterone), which stimulate later development of the ovary. In the sexually undifferentiated embryo, testosterone stimulates the development of the Wolffian ducts, the penis, and closure of the labioscrotal folds into the scrotum. Another significant hormone in sexual differentiation is the Anti-müllerian hormone, which inhibits development of the Müllerian ducts.For males during puberty, testosterone, along with gonadotropins released by the pituitary gland, stimulates spermatogenesis, along with the full sexual distinction of a human male from a human female, while women are acted upon by estrogens and progesterones to produce their sexual distinction from the human male.

Masculinity

{{globalize}}{{see also|Stereotype}} Enormous debate in Western societies has focused on perceived social, intellectual, or emotional differences between women and men. These differences are very difficult to quantify for both scientific and political reasons, though they tend to have a high expectancy for men. Masculinity has its roots in genetics (see gender).(3)(4) Therefore while masculinity looks different in different cultures, there are common aspects to its definition across cultures.(5) Sometimes gender scholars will use the phrase "hegemonic masculinity" to distinguish the most dominant form of masculinity from other variants. In the mid-twentieth century United States, for example, John Wayne might embody one form of masculinity, while Albert Einstein might be seen as masculine, but not in the same "hegemonic" fashion.Machismo is a form of masculine culture. It includes assertiveness or standing up for one's rights, responsibility, selflessness, general code of ethics, sincerity, and respect.(6)Anthropology has shown that masculinity itself has social status, just like wealth, race and social class. In western culture, for example, greater masculinity usually brings greater social status. Many English words such as virtue and virulant (from the Latin vir meaning man) reflect this. An association with physical and/or moral strength is implied. Masculinity is associated more commonly with men than with boys.A great deal is now known about the development of masculine characteristics. The process of sexual differentiation specific to the reproductive system of Homo sapiens produces a female by default. The SRY gene on the Y chromosome, however, interferes with the default process, causing a chain of events that, all things being equal, leads to testes formation, androgen production and a range of both natal and post-natal hormonal effects covered by the terms masculinization or virilization. Because masculinization redirects biological processes from the default female route, it is more precisely called defeminization.There is an extensive debate about how children develop gender identities.In many cultures displaying characteristics not typical to one's gender may become a social problem for the individual. Among men, some non-standard behaviors may be considered a sign of homosexuality, while a girl who exhibits masculine behavior is more frequently dismissed as a "tomboy". Within sociology such labeling and conditioning is known as gender assumptions and, and is a part of socialization to better match a culture's mores. The corresponding social condemnation of excessive masculinity may be expressed in terms such as "machismo" or "testosterone poisoning."The relative importance of the roles of socialization and genetics in the development of masculinity continues to be debated. While social conditioning obviously plays a role, it can also be observed that certain aspects of the masculine identity exist in almost all human cultures.The historical development of gender role is addressed by such fields as behavioral genetics, evolutionary psychology, human ecology and sociobiology. All human cultures seem to encourage the development of gender roles, through literature, costume and song. Some examples of this might include the epics of Homer, the King Arthur tales in English, the normative commentaries of Confucius or biographical studies of the prophet Muhammad. More specialized treatments of masculinity may be found in works such as the Bhagavad Gita or bushido's Hagakure.

Characteristics

Janet Saltzman Chafetz (1974, 35-36) describes seven areas of masculinity in general culture:

1. Physical -- virile, athletic, strong, brave. Unconcerned about appearance and aging;
2. Functional -- provider for family, defender of family from physical threat;
3. Sexual -- sexually aggressive, experienced. Single status acceptable;
4. Emotional -- unemotional, stoic, never crying;
5. Intellectual -- logical, intellectual, rational, objective, practical;
6. Interpersonal -- leader, dominating; disciplinarian; independent, free, individualistic; demanding;
7. Other Personal Characteristics -- success-oriented, ambitious, aggressive, proud, egotistical, moral, trustworthy; decisive, competitive, uninhibited, adventurous.

None of these personality traits have been supported by scientific research. All should be considered broad and uneducated generalisations.A number of the above stereotypes were not perceived in the same way as today (i.e., their applications to particular aspects and spheres of life, such as work vs. home) until the 19th century, beginning with industrialization.

Culture and gender roles

Well into prehistoric culture, men are believed to have assumed a variety of social and cultural roles which are likely similar across many groups of humans. In hunter-gatherer societies, men were often if not exclusively responsible for all large game killed, the capture and raising of most or all domesticated animals, the building of permanent shelters, the defense of villages, and other tasks where the male physique and strong spatial-cognition were most useful. Some anthropologists believe that it may have been men who led the Neolithic Revolution and became the first pre-historical ranchers, as a possible result of their intimate knowledge of animal life.Throughout history, the roles of men have changed greatly. As societies have moved away from agriculture as a primary source of jobs, the emphasis on male physical ability has waned. Traditional gender roles for working men typically involved jobs emphasizing moderate to hard manual labor (see Blue-collar worker), often with no hope for increase in wage or position. For poorer men among the working classes the need to support their families, especially during periods of industrial change and economic decline, forced them to stay in dangerous jobs working long arduous hours, often without retirement. Many industrialized countries have seen a shift to jobs which are less physically demanding, with a general reduction in the percentage of manual labor needed in the work force (see White-collar worker). The male goal in these circumstances is often of pursuing a quality education and securing a dependable, often office-environment, source of income. The Men's Movement is in part a struggle for the recognition of equality of opportunity with women, and for equal rights irrespective of gender, even if special relations and conditions are willingly incurred under the form of partnership involved in marriage. The difficulties of obtaining this recognition are due to the habits and customs recent history has produced. Through a combination of economic changes and the efforts of the feminist movement in recent decades, men in some societies now compete with women for jobs that traditionally excluded women. Some larger corporations have instituted tracking systems to try to ensure that jobs are filled based on merit and not just on traditional gender selection. Assumptions and expectations based on sex roles both benefit and harm men in Western society (as they do women, but in different ways) in the workplace as well as on the topics of education, violence, health care, politics, and fatherhood - to name a few. Research has identified anti-male sexism in some areas (a concept which must be distinguished and differentiated from the traditional anti-female sexism in its ubiquity and impact) which can result in what appear to be unfair advantages given to women.The Parsons model was used to contrast and illustrate extreme positions on gender roles. Model A describes total separation of male and female roles, while Model B describes the complete dissolution of barriers between gender roles.(7) The examples are based on the context of the culture and infrastructure of the United States. However, these extreme positions are rarely found in reality; actual behavior of individuals is usually somewhere between these poles. The most common 'model' followed in real life in the United States and Great Britain is the 'model of double burden'.{| class="wikitable" border="1" style="border-collapse: collapse;"|Model A - Total role segregationModel B - Total disintegration of rolesEducationProfessionHouseworkDecision makingChild care and education

	bgcolor="#FFDEAD" |
	bgcolor=#FFEFDB		Co-educative schools, same content of classes for girls and boys, same qualification for women and men.
	bgcolor=#FFEFDB		For women, career is just as important as for men; Therefore equal professional opportunities for women and men are necessary.
	bgcolor=#FFEFDB		All housework is done by both parties to the marriage in equal shares.
	bgcolor=#FFEFDB		Neither partner dominates; solutions do not always follow the principle of finding a concerted decision; status quo is maintained if disagreement occurs.
	bgcolor=#FFEFDB		Women and men share these functions equally.

Further reading

• Andrew Perchuk, Simon Watney, Bell Hooks, The Masculine Masquerade: Masculinity and Representation, MIT Press 1995
• Pierre Bourdieu, Masculine Domination, Paperback Edition, Stanford University Press 2001
• Robert W. Connell, Masculinities, Cambridge : Polity Press, 1995
• Warren Farrell, Myth of Male Power Berkley Trade, 1993 ISBN 0-425-18144-8
• Michael Kimmel (ed.), Robert W. Connell (ed.), Jeff Hearn (ed.), Handbook of Studies on Men and Masculinities, Sage Publications 2004

See also

{|width=100%valign=top

• Andrology
• Barechested
• Father's rights
• Gender and sexuality studies
• Gender differences
• Gender identity
• Guy
• (:Category:Lists of men|Lists of Men)
• Machismo
• Male chauvinism
• Masculinity
• Masculine psychology, discipline of

• Masculism
• Men's health
• Men's movement
• Men's studies
• Men's Rights
• Misandry
• Prostate cancer
• Patriarchy
• Testicular cancer
• Urology
• Virility (social traits of men)

References

1. The Vitruvian man



2. The Vitruvian man



3. John Money, 'The concept of gender identity disorder in childhood and adolescence after 39 years', Journal of Sex and Marital Therapy 20 (1994): 163-77.



4. Laura Stanton and Brenna Maloney, 'The Perception of Pain', Washington Post, 19 December 2006.



5. Donald Brown, Human Universals



6. Mirande, Alfredo (1997). Hombres y Machos: Masculinity and Latino Culture, p.72-74. ISBN 0-8133-3197-8.



7. Brockhaus: Enzyklopädie der Psychologie, 2001.

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(...as imported from WP)