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प्रश्न
Describe the process of fertilisation in human beings.
उत्तर
Fertilisation involves the fusion of the male and the female gamete. The male and the female gametes are released from the male and the female reproductive organs. Sperm, or male gametes, are released from the male reproductive organ, i.e., the penis. These sperms then enter the female body through the vagina. Then, they travel through the fallopian tubes to meet the eggs. Hence, the process of fertilisation takes place in the fallopian tubes.
During fertilisation, the haploid nucleus of the sperm and that of the ovum fuse to form the zygote. This zygote divides to form an embryo, which in turn develops into a foetus.
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संबंधित प्रश्न
Oviparous animals give birth to young ones.
A new human individual develops from a cell called gamete.
In which female reproductive organ does the embryo get embedded?
Complete the crossword puzzle using the hints given below.
Across
1. The process of the fusion of the gametes.
6. The type of fertilisation in hen.
7. The term used for bulges observed on the sides of the body of Hydra.
8. Eggs are produced here
Down
2. Sperms are produced in these male reproductive organs.
3. Another term for the fertilised egg.
4. These animals lay eggs.
5. A type of fission in amoeba.
List any four steps involved in sexual reproduction .
Fill in the following blank with suitable word :
The cells involved in sexual reproduction are called .............
Put a tick mark (✓) against the correct alternative in the following statement:
Amoeba is most commonly reproduced by:
Distinguish between the following pair of terms:
Budding and Regeneration.
Give an account of external genitalia in human females.
