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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
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.
Briefly describe the process of spermatogenesis.
What is gamete formation?
Define gametogenesis.
Describe the structure of the human ovum with a neat labelled diagram.
Which of the following occurs during maturation phase of spermatogenesis?
Conversion of spermatid into sperm is called as _______.
Extrusion of second polar body from egg nucleus occurs ______.
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
Corona radia is made up of ______.
Which of the following groups of cells in the male gonad, represent haploid cells?
Which of the following contains the actual genetic part of a sperm?
The prostate gland and seminal vehicle perform the function of ______.
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:
Growth hormone of pituitary is more effective in ______.
How many primary oocytes produce one oogonia?
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
Process of maturation and development of sperms ______.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
Distinguish between human sperm and ovum.
