Etymology From haplo- + -oid, Ancient Greek roots meaning, together, literally “simplex” or “onefoldlike”, from ᾰ̔πλόος (hăplóos, “single, simple”, literally “onefold”) and -ειδής (-eidḗs, “-like”).
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Biology, Genetics, Medicine, Natural sciences, SciencesBroadly Having the number of chromosomes that a typical gamete has (in the given organism), namely, half the number that a typical somatic cell has (in the given organism).
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Biology, Genetics, Medicine, Natural sciences, SciencesBroadly Having a single set of unpaired chromosomes (which is the number that a typical gamete has in many organisms although not all).
Examples of haploid cells are prokaryotes and the gametes of eukaryotes.
It has been shown, however, that triploid forms producing diploid gametes in one sex and haploid ones in the other sex can act as a stepping stone towards tetraploidization (triploid bridge; [ 93 – 95 ]).2015 July 4, Heinz-Ulrich Reyer, Christian Arioli-Jakob, Martina Arioli, “Post-zygotic selection against parental genotypes during larval development maintains all-hybrid populations of the frog Pelophylax esculentus”, in BMC Evolutionary Biology, volume 15, →DOI:
Etymology From haplo- + -oid, Ancient Greek roots meaning, together, literally “simplex” or “onefoldlike”, from ᾰ̔πλόος (hăplóos, “single, simple”, literally “onefold”) and -ειδής (-eidḗs, “-like”).
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A cell which is haploid.
In teleosts, double haploids (DHs) induced by mitogynogenesis are often sterile.2015 November 19, “Gonadal Transcriptome Analysis in Sterile Double Haploid Japanese Flounder”, in PLOS ONE, →DOI:
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An organism, such as a fungus, with haploid cells.