Dictionary > Dictyate

Dictyate

Definition
noun
A resting phase in mammalian oogenesis wherein the developing oocyte is arrested in prophase I of meiosis and would resume going through the rest of the stages of meiosis at puberty
Supplement
The dictyate refers to the resting phase in the oogenesis in certain mammals. Oogenesis is the formation and the development of an ovum. In mammals, it is comprised of a series of biological processes namely oocytogenesis, ootidogenesis, and ovum maturation. Oocytogenesis is the first stage wherein the oogonium divides mitotically to give rise to more oogonia. Each of these oogonia would develop and transform into primary oocyte that would enter meiotic division (particularly referred to as ootidogenesis). This process occurs during fetal stage. The development of primary oocytes, however, will be arrested at prophase I of the first meiotic division. In humans, the primary oocytes will rest at diplotene stage of prophase I. Diplotene is the late stage of prophase I and highlighted by homologous chromosome pairs that begin to separate and move away from one another except at chiasmata. The rest of the stages of meiosis will resume until puberty, particularly shortly before ovulation by the surge of luteinizing hormone.
Word origin: Ancient Greek díktuon (“net”) +‎ –ate
Also called:

  • dictyotene stage

See also:

  • oogenesis
  • diplotene
  • meiosis


  • You will also like...

    Lights' Effect on Growth
    Lights’ Effect on Growth

    This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

    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..

    green leaf - close up view
    Leaves

    Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..

    bryophyte - sporophyte and gametophyte
    Meiosis and Alternation of Generations

    Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

    An artist's depiction of the origin of amphibians
    Amphibians & Early Reptiles

    Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

    Endemic Flora of New Zealand
    New Zealand’s Unique Flora

    If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..

    Related Articles...

    No related articles found

    See all Related Topics