Question

what is oogenesis give a brief account of oogenesis

Answer 1

Oogenesis is the differentiation of the ovum(egg cell) into a cell competent to further develop when fertilized. It is developed from the primary oocyte by maturation. Oogenesis is initiated in the embryonic stage.

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Answer 2

Answer :-

In general terms, Oogenesis can be defined as the process of maturation of the reproductive cells in the ovaries.

Extra Information :-

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• Basically, Oogenesis is similar to the process of "Spermatogenesis.

• Oogenesis includes- Phase of multiplication, Phase of growth and Phase of maturation.

• During the phase of multiplication, the primordial cells in the ovary divide mitotically to form Oogenia.

• Oogenia are also known as "Egg mother cells".

• Each Oogonium divides mitotically to form two primary "Ooyocytes".

• Primary Ooyocytes undergo growth.

• During the phase of maturation, the primary Ooyocytes (2n) undergo meiosis I, producing two haploid cells (n).

• The larger haploid cell becomes the secondary Ooyocyte.

• The smaller haploid cell becomes the first polar body.

• Meiosis II of the secondary Ooyocyte results in the formation of functional eggs (ovum) and a second polar body.

• In Oogenesis, only one of the four products of meiosis becomes a functional egg. The rest three products of meiosis are the non-functional polar bodies which finally get degenerated.