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...

    Thermographic image of face and neck
    Regulation of Organic Metabolism, Growth and Energy Balance

    The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

    Balanced Diet
    A Balanced Diet – Minerals and Proteins

    Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..

    Darwin's Finches - Natural Selection
    Darwin and Natural Selection

    This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

    DNA molecule
    Genetic Control – On and Off Genes

    Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

    sponge
    Primitive Animals

    Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

    Ecological Research Measuring & Analysis
    Ecological Research: Measuring & Analysis

    This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..