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प्रश्न
Explain the process of fertilization.
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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 appropriate term for the following:
Process of fusion of ovum and sperm.
Name the following:
Organ producing sperms.
The figure given below represents the female reproductive system of a mammal.
What will happen if the part B on both sides gets blocked?
How is the fetus protected?
Give Reasons
Millions of sperms are produced at ejaculation yet one sperm actually fertilizes the ovum. Explain.
Explain the term Cowper’s glands.
Give Technical Term:
How much semen is discharged per ejaculation in a man?
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 _____.
Complete the following sentences with appropriate word:
Fertilization of the human egg by the sperm normally occurs in the_______
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Fertilization is the product of the egg nucleus and the sperm nucleus.
Write the functional activity of the following structure:
Seminal vesicles
Answer the following question.
What is capacitation? Give its importance.
Which parts are converted into Seed and fruit respectively after fertilization?
What is sex chromosomes?
Which hormones are called neurohypophyseal hormones?
Name the parts of fallopian tubes.
Explain tubectomy and vasectomy.
On which day of the menstrual cycle does ovulation typically occur?
Which structure sweeps the ovum into the fallopian tube after ovulation?
