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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
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions
(a) Acrosome
(b) Nucleus
(c) Middle piece
The fusion of the male and the female gametes is called ______.
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
The Androgen Binding Protein (ABP) is produced by ____________.
At what stage of development are the gametes formed in newborn male and female?
Give a schematic representation of spermatogenesis and oogenesis in humans.
During spermatogenesis, spermatogonium grows in size to become ______.
The part labelled as ______ contains the energy source that facilitates sperm motility.
Which of the following occurs during maturation phase of spermatogenesis?
Identify the CORRECT sequence of events.
Which of the following is diploid?
By which process sperms released from the seminiferous tubules?
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
At what stage of life is oogenesis initiated in a human female?
Which of the following is a primary sex organ of female?
Which of the following are called dual gland?
In human females, meiosis II is not completed until:
What is the difference between a primary oocyte and a secondary oocyte?
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
