References

Alberts B, Johnson A, Lewis J, Raff M, Roberts K, and Walter P (2002). Molecular Biology of the Cell, 4th edition. ISBN 0-8153-3218-1.
Gilbert SF (2000). Developmental Biology, 6th edition, Sinauer Associates, Inc.. ISBN 0-87893-243-7.

Notes
^ Alberts et al. (2002), V. 20. The Benefits of Sex
^ Alberts et al. (2002), V. 20. Meiosis
^ Gilbert (2000), 1.2. Multicellularity: The Evolution of Differentiation
^ Alberts et al. (2002), V. 21. Caenorhabditis Elegans: Development from the Perspective of the Individual Cell
^ Alberts et al. (2002), 3. Mendelian genetics in eukaryotic life cycles
^ Alberts et al. (2002), V.20. Sperm
^ Alberts et al. (2002), V.20. Eggs
^ Alberts et al. (2002), V.20. Fertilization
^ Ritchison G. Avian Reproduction. Eastern Kentucky University. Retrieved on 2008-04-03.
^ Gilbert (2000), 4.20. Gamete Production in Angiosperms
^ Nick Lane (2005). Power, Sex, Suicide: Mitochondria and the Meaning of Life. Oxford University Press, 236-237. ISBN 0192804812.
^ Matthew P Scott, Paul Matsudaira, Harvey Lodish, James Darnell, Lawrence Zipursky, Chris A Kaiser, Arnold Berk, Monty Krieger (2000). Molecular Cell Biology, Fourth Edition, WH Freeman and Co. 14.1. Cell-Type Specification and Mating-Type Conversion in Yeast
^ Book Review for Life: A Natural History of the First Four Billion Years of Life on Earth. Jupiter Scientific. Retrieved on 2008-04-07.
^ Amanda Schaffer, Pas de Deux: Why Are There Only Two Sexes?, Slate updated 27 September, 2007.
^ Laurence D. Hurst, 'Why are There Only Two Sexes?', Proceedings: Biological Sciences 263 (1996): 415-422
^ ES Haag, 'Why two sexes? Sex determination in multicellular organisms and protistan mating types', Seminars in Cell and Developmental Biology 18 (2007): 348-9.
^ a b Dellaporta SL, Calderon-Urrea A (1993). "Sex Determination in Flowering Plants". The Plant Cell 5: 1241-1251.
^ Smith CA, Katza M, Sinclair AH (2003). "DMRT1 Is Upregulated in the Gonads During Female-to-Male Sex Reversal in ZW Chicken Embryos". Biology of Reproduction 68: 560-570.
^ Evolution of the Y Chromosome. Annenberg Media. Retrieved on 2008-04-01.
^ Yoshimura A (2005). "Karyotypes of two American field crickets: Gryllus rubens and Gryllus sp. (Orthoptera: Gryllidae)". Entomological Science 8 (3): 219-222.
^ Riddle DL, Blumenthal T, Meyer BJ, Priess JR (1997). C. Elegans II. Cold Spring Harbor Laboratory Press. ISBN 0-87969-532-3. 9.II. Sexual Dimorphism
^ Charlesworth B (2003). "Sex Determination in the Honeybee". Cell 114 (4): 397-398.
^ Tanurdzic M and Banks JA (2004). "Sex-Determining Mechanisms in Land Plants". The Plant Cell 16: S61-S71.
^ Darwin C (1871). The Descent of Man and Selection in Relation to Sex. Murray, London.
^ Stuart-Smith J, Swain R, Stuart-Smith R, Wapstra E (2007). "Is fecundity the ultimate cause of female-biased size dimorphism in a dragon lizard?". Journal of Zoology 273 (3): 266-272.
^ Zahavi, A. and Zahavi, A. (1997) The handicap principle: a missing piece of Darwin's puzzle. Oxford University Press. Oxford. ISBN 0-19-510035-2

External links and further reading
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Learning resources
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
Maynard-Smith, J. The Evolution of Sex. Cambridge University Press, 1978.
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