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The answer is yes. Female infants are born with primary oocytes that are stalled in prophase I until puberty. At the onset of puberty, the ovaries begin oogenesis. During oogenesis, three polar bodies and one functional gamete are produced. Oogenesis is achieved through meiosis. However, the ovulated secondary oocyte arrests in metaphase II and does not complete meiosis II until it is fertilized.
No, meiosis in females completes when the oocyte is ovulated, regardless of whether fertilization occurs. If fertilization occurs, the second stage of meiosis is completed by the fusion of the oocyte with a sperm cell. If fertilization does not occur, the oocyte degenerates and is eventually expelled from the body during menstruation.
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What is the difference between ovum and secondary oocyte?
An ovum is a mature female reproductive cell that has completed meiosis. A secondary oocyte is an intermediate stage in meiosis that occurs during ovulation and has not yet completed meiosis.
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.
What is another name for an immature egg cell?
gametes, sex cells, haploid cells. the process is meiosis.
The meiosis of egg formation is called?
The meiosis of egg formation is called oogenesis. During oogenesis, a primary oocyte undergoes two divisions to produce a single mature egg cell.
What is the final product of meiosis?
Four haploid cells (23 chromosomes, N in humans) from the two haploid cells (23 chromosomes, N * each of the chromosomes consisting of two sister chromatids are produced as a result of meiosis in males and females.
When does an oocyte complete meiosis II?
An oocyte completes meiosis II after it is fertilized by a sperm cell. This process results in the formation of a mature ovum (egg) with a haploid set of chromosomes.
Is Oocyte haploid?
Unfertilized egg is haploid; but fertilized egg is diploid. That is why you sometimes see chickens even in commercial eggs.
How many functional ova are produced at the end of one complete cycle of meiosis?
In females, one functional ovum is produced at the end of one complete cycle of meiosis. Meiosis I produces a secondary oocyte, and meiosis II forms a mature ovum (egg cell) after fertilization.
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?
An ovum is a mature female reproductive cell that has completed meiosis. A secondary oocyte is an intermediate stage in meiosis that occurs during ovulation and has not yet completed meiosis.
The cell resulting from meiosis in either males or females are called?
The cell resulting from meiosis in males is called spermatids, which will further mature into sperm cells. In females, the cell resulting from meiosis is called a secondary oocyte, which will later develop into an egg upon fertilization.
What is period of ovum?
an ovum mature oocyte after meiosis division
What is the period of ovum?
an ovum mature oocyte after meiosis division
Which of the following can be fertilized to produce a zygote?
Secondary oocyte
Is the primary oocyte diploid?
92 In women, gametogenesis begins in fetal life, but is arrested in prophase of meiosis I for years until just before ovulation. This arrested oocyte is called the "primary oocyte". The human genome consists of 23 chromosomes, and normal somatic cells in humans have two of each chromosome (2N) in the resting state. Since the DNA in the primary oocyte has already replicated and but hasn't undergone division yet, the cell contains double the number of chromosomes of the original cell. Therefore the primary oocyte has 92 chromosomes (4N). Keep in mind though, that just before ovulation, the cell will complete meisois I and be released as 2N (the other 2N is split off as the 1st polar body). This released cell (secondary oocyte) which is now 2N is arrested in metaphase of meiosis II until fertilized, where it will release a second polar body (which now only has 1N). The fertilized egg therefore has two copies of chromosomes, 23 from mother (from the original 92 you started out with), and 23 from the sperm.
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.
