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प्रश्न
Explain two main process in sexual reproduction.
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उत्तर
Two main processes involved in sexual reproduction:
- Gamete formation: In this, meiotic division occurs due to which chromosome number is reduced to half. As a result, haploid gametes are formed (2n → n).
- Fertilization: Haploid male gamete (n) fuses with the haploid female gamete (n) to form a diploid zygote (2n).
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संबंधित प्रश्न
Give the name and function for ‘A’ and ‘B’ from the diagram given below
Explain the development of a secondary oocyte (ovum) in a human female from the embryonic stage upto its ovulation. Name the hormones involved in this process.
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Multiple choice question.
The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?
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Define gametogenesis.
Which of the following are known as the nourishing cells present in the seminiferous tubules?
Which of the following occurs during maturation phase of spermatogenesis?
Which of the following is diploid?
Which of the following contains a fluid filled cavity called antrum?
The cell which undergoes meiosis I during spermatogenesis is the ______.
How many sperms are formed from 4 primary spermatocytes?
Which of the following groups of cells in the male gonad, represent haploid cells?
After the release of the secondary oocyte, the Graafian follicle develops into ______.
How many spermatozoa are formed from one secondary spermatocyte?
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
The diagram given below shows the various steps in spermatogenesis.
- Name the parts labelled '1', '2' and '3'.
- Name the process by which part '3' changes to part '4'.
The process of gametogenesis is initiated by ______ and ______ hormones respectively.
