Draw a labeled diagram of a Graafian Follicle?
Solution and Explanation
Top Questions on Human Reproduction
- Penetration of the sperm in the ovum is followed by:
- CBSE CLASS XII - 2025
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- Human Reproduction
- During the process of oogenesis in human female, the primary oocyte results in the formation of which of the following?
Choose the correct option.- CBSE CLASS XII - 2025
- Biology
- Human Reproduction
Student to attempt either option (A) or (B):
(A) Explain what is meant by the term amniocentesis. How is this technique misused in India?
OR
(B) Name any two VDs which might occur in a human female. State any two complications in a female if it is left untreated.- CBSE CLASS XII - 2025
- Biology
- Human Reproduction
- Assertion (A): Mode of action of pills and implants/injectables is similar.
Reason (R): The effective period of pills is much longer as compared to implants/injectables.- CBSE CLASS XII - 2025
- Biology
- Human Reproduction
- Given below are few statements with reference to the major events in the menstrual cycle of a human female:
- During the follicular phase, the primary follicles grow to become a Graafian follicle.
- Gonadotropins FSH and progesterone stimulate follicular development during the follicular phase.
- LH surge induces rupture of Graafian follicle thereby releasing the corpus luteum.
- Progesterone released by corpus luteum is essential for maintenance of endometrium.
- Both LH and progesterone attain a peak level in the middle of the cycle.
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Questions Asked in CBSE CLASS XII exam
- Ishan, Jatin and Kapil were partners in a firm sharing profits and losses in the ratio of 5:4:1. Jatin retired and his share was taken up by Ishan and Kapil in the ratio 1:1. The new profit-sharing ratio between Ishan and Kapil after Jatin's retirement will be:
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- “Where there is a will, there is a way.” The above saying aptly describes the character of Douglas from ‘Deep Water’ and Mukesh from ‘Lost Spring’. Compare and contrast their characters in terms of their courage, determination, and the pursuit of their goals.
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- Literature
In the given reaction sequence, the structure of Y would be:
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- Aldehydes, Ketones and Carboxylic Acids
- A proton moving with velocity \( V \) in a non-uniform magnetic field traces a path as shown in the figure. The path followed by the proton is always in the plane of the paper. What is the direction of the magnetic field in the region near points P, Q, and R? What can you say about relative magnitude of magnetic fields at these points?
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- Motion of charged particles in a magnetic field
- Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.
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- Applications of Biotechnology
Concepts Used:
Gametogenesis
The gametogenesis process includes the formation of reproductive cells or sex cells in living organisms. In plants, it is carried throughout mitosis whereas, in animals, it is carried through meiosis. The formation of male and female gametes are the two basic steps that take place during the gametogenesis process.
Based on the living organism, the process of gametogenesis occurs in:-
Plants: It occurs by the meiotic division of diploid gametocytes. In higher plants, it happens along with sporogenesis.
Animals: It occurs by meiosis where gametes are formed from their diploid mother cells exist in organs called gonads.
Stages of Gametogenesis
The gametogenesis process occurs in three steps. They are as follows;
- Mitotic divisions together with cell growth of precursor germ cells.
- The happening of Meiosis I and Meiosis II for producing haploid daughter cells.
- Metamorphose haploid daughter cells for the production of functional gametes.