What type of Eggs you ate in your daily routine?

Classification of eggs which is based on the amount of yolk, based on the distribution of yolk and other types of eggs.

  • On the Basis of the Amount of yolk types of eggs are
    • Alecithal Egg: When the egg contains no yolk, it is called alecithal egg.
    • Microlecithal Egg: When the egg contain  small or negligible amount of yolk it is said to be microlecithal.
    • Mesolecithal egg: The amount of yolk present is moderate and is not high.
    • Macrolecithal/Megalecithal Egg: When the egg contains large amount of yolk it is said to be macrolecithal or megalecithal egg.

 

  • On the Basis of the distribution of yolk types of eggs are
    • Isolecithal/Homolecithal Egg: ln isolecithal eggs, the very little amount of yolk present is uniformly distributed throughout the ooplasm.
    • Telolecithal Egg: In eggs containing moderate or large quantity of yolk, the distribution of yolk is not uniform. lt is concentrated more towards the vegetal pole.
      • Telolecithal eggs may further classified into three types:

        1.Slightly Telolecithal

        2.Moderately Telolecithal

        3.Extremely Telolecithal

    • Centrolecithal Egg: They are relatively large and elongate and have a very great amount of yolk. The nucleus lies at the geometric centre of the yolk mass, surrounded by a small amount of cytoplasm. A thin cytoplasmic layer covers the surface of the yolk.

 

  • Other types are
    • Mosaic egg: ln certain eggs, every portion is predetermined with respect to its potentialities for further development.
    • Regulative egg: ln vertebrates and most of the invertebrates, the developmental potentialities are not predetermined in the eggs.

For more details with images please download the attachment- PPT.

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