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[[Image:lighterstill.jpg]][[Image:Sexualitysmall.jpg|right|frame]]

[[Image:lighterstill.jpg]][[Image:Sexualitysmall.jpg|right|frame]]

Sexuality refers to a biologic state where reproduction is characterized by some manner of sexual union between the male and female of a species. This processes enables the passing of  a combination of [[Genetics|genetic]] [[material]] to offspring, resulting in [[creativity|creative]] diversity. The main two processes are: [[meiosis]], involving the halving of the number of [[chromosome]]s; and [[fertilization]], involving the [[fusion]] of two gametes and the restoration of the original number of chromosomes. During meiosis, the chromosomes of each pair usually cross over to achieve genetic recombination.

Sexuality refers to a biologic state where reproduction is characterized by some manner of sexual union between the male and female of a species. This processes enables the passing of  a combination of [[Genetics|genetic]] [[material]] to offspring, resulting in [[creativity|creative]] diversity. The main two processes are: [[meiosis]], involving the halving of the number of [[chromosome]]s; and [[fertilization]], involving the [[fusion]] of two gametes and the restoration of the original number of chromosomes. During meiosis, the chromosomes of each pair usually cross over to achieve genetic recombination.

The [[evolution]] of [[sexual reproduction]] is a major puzzle. The first [[fossil]]ized evidence of sexually reproducing organisms is from eukaryotes of the Stenian period, about 1 to 1.2 billion years ago. [http://proxy.arts.uci.edu/~nideffer/Hawking/early_proto/orgel.html] Sexual reproduction is the primary method of reproduction for the vast majority of macroscopic organisms, including almost all [[animal]]s and [[plant]]s. Bacterial conjugation, the transfer of [[DNA]] between two bacteria, is often mistakenly confused with sexual reproduction, because the mechanics are similar.

The [[evolution]] of [[sexual reproduction]] is a major puzzle. The first [[fossil]]ized evidence of sexually reproducing organisms is from eukaryotes of the Stenian period, about 1 to 1.2 billion years ago. [http://proxy.arts.uci.edu/~nideffer/Hawking/early_proto/orgel.html] Sexual reproduction is the primary method of reproduction for the vast majority of macroscopic organisms, including almost all [[animal]]s and [[plant]]s. Bacterial conjugation, the transfer of [[DNA]] between two bacteria, is often mistakenly confused with sexual reproduction, because the mechanics are similar.