Advertisements
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Oviparous animals give birth to young ones.
Which species is likely to have better chances of survival - the one reproducing asexually or the one reproducing sexually? Justify your answer.
The advantage that internal fertilisation has over external fertilisation is that in internal fertilisation :
(a) new off-springs are exactly like the parent
(b) production of large numbers of gametes is unnecessary
(c) copulation and fusion of gametes is passive
(d) fewer individuals are produced
Mention the common method of reproduction in Amoeba.
How is the chromosome number maintained in sexually reproducing organisms?
Which are the components of pollination?
Due to presence of which of the following chemical component, pollen grains can remain well preserved in fossil?
Characters that are transmitted from parents to offspring during reproduction show ______
Differentiate between oestrus and menstrual cycles. Cite an example for each type.
Explain how stability of the DNA of the species is ensured in sexually reproducing organisms.
