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प्रश्न
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
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उत्तर
The zygote is formed by the fusion of a male and a female gamete. Therefore, the number of chromosomes in a zygote is twice as many as that of a gamete, i.e., 48.
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संबंधित प्रश्न
Name the parts labelled as A, B, C and D in the diagram given below:
The process of fusion of the male and female gametes is called ______.
What is the name of female organ of a flower (other than carpel)?
How do the insects help in cross-pollination?
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
What part is played by stamens and carpels in reproduction?
Answer the following question.
List two agents of pollination?
Find the odd one out:
Antipodal cells are present towards the ______ in an anatropous ovule.
Which type of development is observed in male gametophytes of plants?
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
Where is the zygote located in the flower after fertilization?
State the number of sets of chromosomes present in a zygote.
Double fertilization is exhibited by ______
What is puberty?
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
