haploid
Having a single set of chromosomes in each cell. Most higher organisms are diploid – that is, they have two sets – but their gametes (sex cells) are haploid. Some plants, such as mosses, liverworts, and many seaweeds, are haploid, and male honey bees are haploid because they develop from eggs that have not been fertilized. See also meiosis.
© RM 2012. Helicon Publishing is division of RM.
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