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The defining characteristic of sexual reproduction in eukaryotes is the difference between the gametes and the binary nature of fertilization.Multiplicity of gamete types within a species would still be considered a form of sexual reproduction.Typically, prior to an asexual division, a cell duplicates its genetic information content, and then divides. In sexual reproduction, there are special kinds of cells that divide without prior duplication of its genetic material, in a process named meiosis.The resulting cells are called gametes, and contain only half the genetic material of the parent cells.
In addition to animals, plants, and fungi, other eukaryotes (e.g.
One of the basic properties of life is reproduction, the capacity to generate new individuals, and sex is an aspect of this process.
Life has evolved from simple stages to more complex ones, and so have the reproduction mechanisms.
For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
Among humans and other mammals, males typically carry XY chromosomes, whereas females typically carry XX chromosomes, which are a part of the XY sex-determination system.
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In complex organisms, the sex organs are the parts that are involved in the production and exchange of gametes in sexual reproduction.