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प्रश्न
Explain the process of fertilization.
उत्तर
Process of fertilization in humans:
- Formation of zygote by union of sperm and ovum is called as fertilization.
- Fertilization is internal in humans. Semen is ejaculated in vagina during copulation.
- Sperms, in the numbers of few millions, start their journey by the route of vagina – uterus – oviduct.
- One of those few million sperms fertilizes the only ovum present in the oviduct.
Process of fertilization in plants:
- Stigma becomes sticky during pollination.
- The pollen grain germinates over the stigma and gives rise to pollen tube.
- Pollen tube carries two male gametes which are released near egg cell present in the embryo sac.
- One male gamete fuses with a female gamete giving rise to zygote. The second male gamete fuses with two polar nuclei giving rise to endosperm. This is called as double fertilization.
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संबंधित प्रश्न
Give the significance of fertilization.
Define the Zygote.
Name the following:
The part where the sperms are produced in the testes
Differentiate between the following pair:
Efferent duct and sperm duct
Write in sequence the regions in which a mature sperm travels from the seminiferous tubules up to the urethral opening?
How is the fetus protected?
Differentiate
External fertilization and Internal fertilization.
Give Technical Term:
What term is used for the production and maturation of sperms in the testes?
Give Technical Term:
Rupture of the follicle and release of the ovum from the ovary.
Complete the following sentences with appropriate word:
The sperms in a human male are produced in _____.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The process of fusion of the sperm nucleus and the egg nucleus is termed implantation.
Write the functional activity of the following structure:
Seminal vesicles
Multiple Choice Question:
Ovulation in mammals is a process in which
Long answer question.
Describe the process of fertilization.
The enzyme involved in penetration of sperm into ovum is ______.
Identify the function of fertilization membrane.
In human beings, after fertilisation, the structure which gets embedded in the wall of uterus is
State whether True or False:
The chromosome number in germ cells producing the gametes are diploid.
Give any four significances of fertilization in humans.
