It is an unequal division, resulting in the formation of a large haploid secondary oocyte and a tiny first polar body. what is the meaning of it In this paragraph

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It is an unequal division, resulting in the formation of a large haploid secondary oocyte and a tiny first polar body. what is the meaning of it In this paragraph

Asked by anujr9937 | 04 May, 2024, 19:57: PM

Expert Answer

During oogenesis in human females, the primary follicles are surrounded by layers of granulosa cells and a new theca and are called secondary follicles.
The secondary follicle transforms into a tertiary follicle, characterised by a fluid-filled cavity called an antrum.
The theca layer is organised into an inner theca interna and an outer theca externa.
It is important that at this stage, the primary oocyte within the tertiary follicle grows in size and completes its first meiotic division. This unequal division results in the formation of a large haploid secondary oocyte and a tiny first polar body.
The secondary oocyte retains the bulk of the nutrient-rich cytoplasm of the primary oocyte.
The secondary oocyte undergoes a second meiotic division just before fertilisation.
The second meiotic division is also unequal and results in the formation of a second polar body and a haploid ovum (ootid).
Both polar bodies are produced due to unequal division and do not participate in embryo development.

Answered by Sheetal Kolte | 06 May, 2024, 10:09: AM