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प्रश्न
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
पर्याय
1 to 2 million
2 to 3 million
2 to 4 million
none of these
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उत्तर
At the time of birth, there are 2 to 4 million oocytes in the ovary of a female foetus.
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संबंधित प्रश्न
Women are often blamed for producing female children. Consequently, they are ill-treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
The part labelled as ______ contains the energy source that facilitates sperm motility.
Identify the labels (i-iv) in the given diagram of the ovum.
500 spermatozoa are formed from ____________ secondary spermatocytes.
Identify the longest period of menstrual cycle.
Which is the correct order of steps occurring during spermatogenesis?
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
Identify the CORRECT sequence of events.
Four primary spermatocytes give rise to ______.
Which of the following events take place during spermatogenesis?
Select the pair of cells which does not divide further by mitosis.
Middle piece of mammalian sperm possesses ______.
There is no cell division involved in ______.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
Besides activating the egg another role of a sperm is to carry ______ to egg.
Which of the following are called dual gland?
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
Which type of cell division forms spermatids from the secondary spermatocytes?
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
