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See also

Look up Sex in
Wiktionary, the free dictionary.

• Evolution of sex
• Human sexuality
• List of gender names
• Mammalian gestation
• Sexual differentiation
• Sexual dysfunction
• Sex ratio
• Sexual intercourse
• Age of consent

References

1. ^ 'RedList', International Union for the Conservation of Nature and Natural Resources official website.
2. ^ Amanda Schaffer, Pas de Deux: Why Are There Only Two Sexes?, Slate updated 27 September, 2007.
3. ^ Laurence D. Hurst, 'Why are There Only Two Sexes?', Proceedings: Biological Sciences 263 (1996): 415-422
4. ^ ES Haag, 'Why two sexes? Sex determination in multicellular organisms and protistan mating types', Seminars in Cell and Developmental Biology 18 (2007): 348-9.
5. ^ Patricia J. Schmidt, Wade C. Sherbrooke, Justin O. Schmidt, 'The Detoxification of Ant (Pogonomyrmex) Venom by a Blood Factor in Horned Lizards (Phrynosoma)', Copeia 198 (1989): 603-607.
6. ^ Leslie E. Orgel, 'The Origin of Life on the Earth', Scientific American October, 1994.
7. ^ H. Gee, JR Pickavance and JO Young, 'A comparative study of the population biology of the American immigrant triclad Dugesia tigrina (Girard) in two British lakes', Hydrobiologia 361 (1977): 135-143.
8. ^ Evolution with three sexes. University of British Columbia. Retrieved on 2007-01-03.
9. ^ G. E. Julian, J. H. Fewell, J. Gadau, R. A. Johnson, D. Larrabee (2002). "Genetic determination of the queen caste in an ant hybrid zone". Proceedings of the National Academy of Sciences 99 (12): 8157-8160.
10. ^ Whitfield, John (2004). "Everything You Always Wanted to Know about Sexes". Public Library of Science: Biology 2 (6).
11. ^ Tuatara
12. ^ Observations on Inheritance in Coprinus macrorhizus (Pers.) Rea
13. ^ The Pycnidia of the Rust Fungi
14. ^ The Five Sexes Revisited, Sciences, Jul/Aug2000, Vol. 40 Issue 4, p18, 6p, 1c, 2bw
15. ^ Two Sexes Are Not Enough
16. ^ Cytoplasmic Fusion and the Nature of Sexes
17. ^ "thickens the brow and upper bridge of the nose" [1]
18. ^ [2], [3]
19. ^ Nikolaos A. Patsopoulos, et al. (Aug 2007). "Claims of sex Differences: An empirical assessment in genetic associations". J. Am. Med. Assoc. 298 (8): 880-893.

1. http://www.columbia.edu/itc/hs/pubhealth/modules/reproductiveHealth/anatomy.html
2. http://www.humanhormones.com/category/steroids/androgens/
3. http://www.bbc.co.uk/science/humanbody/sex/articles/testosterone.shtml
4. http://www.sciencedaily.com/releases/2007/05/070523105948.htm

External links and further reading

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• Francoeur, Robert T. (ed.), The International Encyclopedia of Sexuality [full text]
• Janssen, D. F., Growing Up Sexually. Volume I. World Reference Atlas [full text]
• Francoeur, Robert T. and Rayond J. Noonan, (eds.) "Continuum Complete International Encyclopedia of Sexuality". Continuum, August 2003, ISBN 0-8264-1488-5
• Human Sexual Differentiation by P. C. Sizonenko
• New Scientist article on Sex chromosomes in the platypus
• Human Sexuality Info by University of California Santa Barbara