haploid Descriptive of a nucleus, cell, or organism that has only a single set of unpaired chromosomes, i.e. half the number of chromosomes found in diploid cells. Most fungi, protists, and algae are haploid, as are some insects and bryophytes, certain stages in the life cycle of plants, and the gametes (reproductive cells) of all organisms. The fusion of two haploid cells restores the normal (diploid) number. Related category • CELL BIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |