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प्रश्न
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
विकल्प
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
The fusion of the male and the female gametes is called ______.
What is gamete formation?
Answer the following type of question Assertion (A) and Reason (R).
(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.
(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.
At what stage of development are the gametes formed in newborn male and female?
Formation of ____________ is an indication of the termination of oogenesis.
Which of the following correctly describes the secondary oocyte?
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
Identify the CORRECT sequence of events.
The immature male germ cells differentiates into ______ at the end of meiosis I.
Acrosome reaction in sperm is triggered by ______.
Which among the following has 23 chromosomes?
The principal tail piece of human sperm shows the microtubular arrangement of ______.
Which of the following is a primary sex organ of female?
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:
The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:
In human females, meiosis II is not completed until:
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
Draw a neat and labelled diagram of spermatogenesis.
Meiotic division of the secondary oocyte completed ______.
At the onset of puberty, gonadotropin releasing hormone is secreted by ______.
