Answer
Verified
382.7k+ views
Hint: The process by which ovum is formed from oogonium is called oogenesis. It occurs in three phases: multiplication, growth, and then maturation.
Complete answer:
Oogenesis is the process by which an ovum or a secondary oocyte is produced from the oogonia.
Oogonium is the singular form, oogonia are plural.
First, during the embryonic period of a female, the primordial germ cells differentiate to form numerous oogonium or oogonial cells.
The cell pool is maintained by repeated mitotic divisions.
Now the oogonia grows into the primary oocytes as the onset of meiosis I occur. After completion of meiosis I, diploid primary oocytes produce two types of haploid cells- a secondary oocyte and the first polar body.
The secondary oocyte completes its meiotic division after sperm entry and produces another polar body and a mature ovum. The first polar body also divides to form two new polar bodies.
Note: Oogenesis is a discontinuous process. It is arrested twice.
First, the primary oocyte is arrested in prophase I; it releases after puberty.
Second, the secondary oocyte is arrested at metaphase II; it releases upon sperm entry.
Complete answer:
Oogenesis is the process by which an ovum or a secondary oocyte is produced from the oogonia.
Oogonium is the singular form, oogonia are plural.
First, during the embryonic period of a female, the primordial germ cells differentiate to form numerous oogonium or oogonial cells.
The cell pool is maintained by repeated mitotic divisions.
Now the oogonia grows into the primary oocytes as the onset of meiosis I occur. After completion of meiosis I, diploid primary oocytes produce two types of haploid cells- a secondary oocyte and the first polar body.
The secondary oocyte completes its meiotic division after sperm entry and produces another polar body and a mature ovum. The first polar body also divides to form two new polar bodies.
Note: Oogenesis is a discontinuous process. It is arrested twice.
First, the primary oocyte is arrested in prophase I; it releases after puberty.
Second, the secondary oocyte is arrested at metaphase II; it releases upon sperm entry.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
Which are the Top 10 Largest Countries of the World?
One cusec is equal to how many liters class 8 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
The mountain range which stretches from Gujarat in class 10 social science CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths