Dictionary > Haplodiploidy

Haplodiploidy

Definition
noun
A biological system of sex determination as observed in the Hymenopteran species (e.g. ants and bees) where unfertilized haploid eggs develop into males and fertilized eggs, into females
Supplement
The sex-determination system, as the name implies, determines the sexual characteristics of an organism. The sex of an organism may be determined internally (genetic) or externally (e.g. by environmental and social variables). In most species, sex determination is determined genetically, i.e. male or female based on the sex chromosomes. Chromosomal systems include XX/XY sex-determination system, Y-centered sex determination, X-centered sex determination, X0 sex-determination system, ZW sex-determination system, and haplodiploidy.
Haplodiploidy is a biological system of sex determination where unfertilized haploid eggs develop into males and fertilized eggs, into females. It is observed in the Hymenopteran species (e.g. ants, bees, and wasps). For instance, the queen honeybee would have three types of offspring based on their social function: female worker bees, male drones, and the new queen bee. Female worker bees and the new queen bee develop from fertilized eggs and are therefore diploid. However, the female worker bees would be sterile. The unfertilized eggs develop into male drones through parthenogenesis, and are haploid individuals.
Haplodiploidy is also seen in thysanopterans (‘thrips’), and in some spider mites, Hemiptera, Coleoptera (bark beetles), and rotifers.
See also:

Related form(s):

  • haplodiploid (noun, a cell or an organism displaying haplodiploidy; adjective, relating to haplodiploidy)


  • You will also like...

    Mātauranga Māori and Science Collaboration
    Mātauranga Māori and Science

    Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships t..

    Chemical effects on plant growth and development
    Effect of Chemicals on Growth & Development in Organisms

    Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..

    Cells in different stages of meiosis
    Meiosis – The Genetics of Reproduction

    Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

    Birth of a Human Baby
    Birth of a Human Baby

    Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

    Crossing Over and Genetic Diversity
    Inheritance and Probability

    Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

    Structural depiction of catalase, an enzyme
    Protein Activity and Cellular Metabolism

    Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

    Related Articles...

    No related articles found

    See all Related Topics