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haploid
haploid Applied to a cell nucleus that contains one of each type of chromosome, i.e. one set of chromosomes, designated n. Gametes are haploid, in contrast with most somatic cells, which usually have some multiple of this number, usually 2n (diploid), but sometimes 3n (triploid), 4n (tetraploid), or many-n (polyploid). A haploid cell thus has only one chromosome set, and a haploid organism contains only haploid cells.
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MICHAEL ALLABY. "haploid." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "haploid." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O7-haploid.html MICHAEL ALLABY. "haploid." A Dictionary of Plant Sciences. 1998. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-haploid.html |
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haploid
haploid Term describing a cell that has only one member of each chromosome pair. All human cells except gametes are diploid, having 46 chromosomes. Gametes are haploid, having 23 chromosomes. The body cells of many lower organisms, including many algae and single-celled organisms, are haploid. See also alternation of generations; meiosis
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"haploid." World Encyclopedia. 2005. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "haploid." World Encyclopedia. 2005. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O142-haploid.html "haploid." World Encyclopedia. 2005. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-haploid.html |
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haploid
hap·loid / ˈhapˌloid/ Genetics • adj. (of a cell or nucleus) having a single set of unpaired chromosomes. Compare with diploid. ∎ (of an organism or part) composed of haploid cells. • n. a haploid organism or cell. DERIVATIVES: hap·loi·dy n. |
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"haploid." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "haploid." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O999-haploid.html "haploid." The Oxford Pocket Dictionary of Current English. 2009. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-haploid.html |
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haploid
haploid Describing a nucleus, cell, or organism with a single set of unpaired chromosomes. The haploid number is designated as n. Reproductive cells, formed as a result of meiosis, are haploid. Fusion of two such cells (see fertilization) restores the normal (diploid) number.
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"haploid." A Dictionary of Biology. 2004. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "haploid." A Dictionary of Biology. 2004. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O6-haploid.html "haploid." A Dictionary of Biology. 2004. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-haploid.html |
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haploid
haploid Applied to the number of chromosomes in a gamete and conventionally symbolized by n. In somatic (i.e. non-sex) cells, the number of chromosomes is usually some multiple of this number (e.g. diploid 2n, triploid 3n, or tetraploid 4n, but sometimes polyploid many-n).
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MICHAEL ALLABY. "haploid." A Dictionary of Ecology. 2004. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "haploid." A Dictionary of Ecology. 2004. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O14-haploid.html MICHAEL ALLABY. "haploid." A Dictionary of Ecology. 2004. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-haploid.html |
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haploid
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"haploid." A Dictionary of Nursing. 2008. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "haploid." A Dictionary of Nursing. 2008. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O62-haploid.html "haploid." A Dictionary of Nursing. 2008. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-haploid.html |
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