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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:
Where are a plant's sex organs located?
What are the reproductive organs in a flower?
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The term used to refer to the transfer of pollen from the stamen of one flower to the carpel of another flower of the same species is...........
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
Name the part of a seed which grows into root.
In what ways is fertilisation in a plant similar to fertilisation in a human?
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
A student is asked to study the different parts of an embryo of pea seeds. Given below are the essential steps for the experiment :
(I) Soak the pea seeds in plain water and keep them overnight.
(II) Cut open the soaked seed and observe its different parts.
(III) Take some pea seeds in a petri dish.
(IV) Drain the excess water. Cover the seeds with a wet cotton cloth and leave them as it is for a day.
The correct sequence of these steps is
(A) III, I, IV, II
(B) III, IV, I, II
(C) III, I, II, IV
(D) III, II, I, IV
Identify the odd. Stigma, Style, Pollen, Ovary.
Find the odd one out:
Pollen tube reaches the embryo sac via style.
Identify the parts A, B, C, and D?
The 3-celled egg apparatus at the micropylar end comprises of ______
Pineapple fruit develops from ______.
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
The pollen tube usually enters the embryo sac ______.
