| haploid | <cell biology, genetics> Describes a nucleus, cell or organism possessing a single set of unpaired chromosomes. Gametes are haploid. (18 Nov 1997) |
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| haploid number | <cell biology, genetics> The haploid number is the total number of chromosomes in a single set, such as would be found in a gamete or a haploid somatic cell (such as in fungus or gametophyte plants). In humans, the haploid number would be 23. (09 Oct 1997) |
| haploid set | The genetic content of a normal gamete in which every autosomal locus is represented by a single allele and either one full set of X-linked genes or one full set of Y-linked genes; the normal adult somatic cell contains two diploid set. (05 Mar 2000) |
| haploidiploidy | <cell biology, genetics> Haploidiploidy is a genetic system in which one sex of the species (usually the male) is haploid (has only one set of chromosomes) and develops from eggs which have not been fertilized by sperm, and the other sex (usually the female) is diploid (has two sets of chromosomes) and develops from fertilized eggs. An example species is the honeybee. (09 Oct 1997) |
| haploidisation | <cell biology, genetics> Haploidisation is the process of creating a haploid cell from a diploid cell by progressively losing chromosomes through nondisjunction (they fail to separate equally into the daughter cells during mitosis). (09 Oct 1997) |
| haploidy | The number of chromosomes in the gametes, which is half the number normally found in somatic cells. Symbol: n. (12 Dec 1998) |