Dictionary > Dizygotic twins

Dizygotic twins

Definition
noun
Two offspring that develop from two zygotes but share a common uterine environment, and would be born at the same birth
Supplement
Twins refer to the two offspring that are brought forth by the same pregnancy and birth. Twins may be monozygotic (or identical) or dizygotic (fraternal).
Dizygotic twins are twins that develop from two zygotes. Dizygotic twins are non-identical because they arise from two eggs, each fertilized by a sperm. They are siblings who have shared a common uterine environment. They are due to fertilization of two different ova by different sperm. Dizygotic twins are also called fraternal twins.
Spontaneous dizygotic twinning occurs when two ova are released from the ovary simultaneously and are fertilized by two sperm cells. As a result, two fertilized ova would be implanted in the uterine wall and would have separate placenta and membranes. They may be of the same sex or of opposite sex. Since the twins developed from separate zygotes the siblings would differ genetically. They may also look very different from each other.
Word origin: Greek dís (“twice”) + zygotic (zygote) twins
Abbreviation / Acronym: DZ twins
Synonym(s):

  • fraternal twins
  • diovular twins
  • dichorial twins
  • heterologous twins
  • binovular twins
  • dissimilar twins
  • non-identical twins
  • false twins

Compare:

  • monozygotic twins
  • See also:

    • twin


    You will also like...

    takahē
    Takahē (Porphyrio hochstetteri)

    Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

    Principles of Hormonal Control Systems
    Principles of Hormonal Control Systems

    Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

    Protein (illustration)
    Protein Variety

    The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..

    Wart-like leaf galls on grape leaves
    Plant Cell Defense

    Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

    Birth Control and Contraception
    Birth Control and Contraception

    Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

    An artist depiction of a Precambrian multicellular life form.
    The Evolution of Cell Organelles

    The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..