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Any oogonia that has arrested itself in meiosis I prophase-dipotene on the onset of OMI (oocye maturation inhibition) hormone in the 3rd month of pregnancy and there after is a primary oocyte.
On the urge of Leutinizing hormone which induces the pre-ovulatory phase, the primary oocyte completes meiosis I and arrests itself in meiosis II metaphase, which would only be completed if fertilization occurs, otherwise it will degenrate in 24 hours.
On the completion of meiosis I, a SECONDARY oocyte and forst polar body is going to be formed.
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When a primary oocyte divides a secondary oocyte and what are produced?
A primary oocyte divides into a secondary oocyte and a polar body during meiosis I. The secondary oocyte undergoes meiosis II to produce a mature ovum (egg) and another polar body.
When the primary oocyte divides a secondary oocyte and what else is produced?
The primary oocyte divides into a secondary oocyte and a polar body during meiosis I. The secondary oocyte then goes through meiosis II to produce a mature ovum (egg) and another polar body.
What is the difference between ovum and secondary oocyte?
ovum is the product after the secondary oocyte fuses with sperm
Compare and contrast Primary oocyte and secondary oocyte?
Primary oocytes are diploid cells that have undergone DNA replication but are arrested in prophase I of meiosis, whereas secondary oocytes are haploid cells resulting from the division of primary oocyte after completing meiosis I. Secondary oocytes are arrested in metaphase II and are released during ovulation, while primary oocytes are present in the ovaries prior to puberty.
When females perform meiosis 1 the cytoplasm of the cells is not divided equally as a result the primary oocyte creates a secondary oocyte and a what?
During meiosis I in females, the primary oocyte divides asymmetrically to produce a secondary oocyte and a smaller polar body. The polar body is a non-functional cell that typically degenerates and does not participate in fertilization. This unequal division allows the secondary oocyte to retain most of the cytoplasm and resources necessary for potential fertilization and early development.
How many secondary oocytes are formed form 20 oogonia?
Each oogonium undergoes mitosis to produce primary oocytes, which then enter meiosis. During meiosis, each primary oocyte completes the first meiotic division to form one secondary oocyte and one polar body. However, only the secondary oocyte is viable. Therefore, from 20 oogonia, 20 primary oocytes are formed, leading to the production of 20 secondary oocytes.
What is the function of the secondary oocyte?
The secondary oocyte is a key stage in the female reproductive process, specifically in oogenesis. It is formed after the primary oocyte undergoes meiosis I, and it contains the majority of the cytoplasm. The secondary oocyte is released during ovulation and, if fertilized by a sperm cell, it will complete meiosis II to become a mature ovum. Its primary function is to provide the necessary genetic material and cellular resources for successful fertilization and early embryonic development.
Is It the secondary oocyte and not the egg that the sperm fertilizes?
Yes, it is the secondary oocyte that the sperm fertilizes. The secondary oocyte completes meiosis II to become a mature egg only after fertilization.
Prenatal maturation of oocyte?
Primordial, secondary, tertiary, and antral are the basic steps in a developing oocyte
In what phase of meiosis is a secondary oocyte arrested?
A secondary oocyte is arrested in the metaphase II phase of meiosis.
At what stage of development does a secondary oocyte arrest in?
A secondary oocyte arrests in the metaphase II stage of development.
When will a secondary oocyte complete meiosis II?
A secondary oocyte will complete meiosis II after fertilization by a sperm cell.
