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In grasses, what happens in microspore mother cell for the formation of mature pollen grains
- a)One meiotic division
- b)One mitotic division
- c)One meiotic and two mitotic divisions
- d)One meiotic and one mitotic division
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
In grasses, what happens in microspore mother cell for the formation o...
Correct Answer: C
Solution :
Pollen mother cell is a diploid structure which undergoes one meiotic division and produces four haploid pollen grains or microspores. Pollen grain is the first cell of male gametophyte.
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In grasses, what happens in microspore mother cell for the formation o...
Microspore Mother Cell Development in Grasses:
One meiotic and two mitotic divisions
- In grasses, the microspore mother cell undergoes a series of divisions to form mature pollen grains.
- Initially, the microspore mother cell undergoes a meiotic division to produce two haploid cells called microspores.
- Each microspore then undergoes two successive mitotic divisions to form a mature pollen grain with three cells - one vegetative cell and two sperm cells.
- The first mitotic division produces a generative cell and a tube cell, with the generative cell eventually dividing to form two sperm cells.
- The tube cell plays a role in pollen tube formation during fertilization.
- This process of one meiotic division followed by two mitotic divisions results in the formation of mature pollen grains in grasses.
One meiotic and two mitotic divisions
- In grasses, the microspore mother cell undergoes a series of divisions to form mature pollen grains.
- Initially, the microspore mother cell undergoes a meiotic division to produce two haploid cells called microspores.
- Each microspore then undergoes two successive mitotic divisions to form a mature pollen grain with three cells - one vegetative cell and two sperm cells.
- The first mitotic division produces a generative cell and a tube cell, with the generative cell eventually dividing to form two sperm cells.
- The tube cell plays a role in pollen tube formation during fertilization.
- This process of one meiotic division followed by two mitotic divisions results in the formation of mature pollen grains in grasses.
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In grasses, what happens in microspore mother cell for the formation of mature pollen grainsa)One meiotic divisionb)One mitotic divisionc)One meiotic and two mitotic divisionsd)One meiotic and one mitotic divisionCorrect answer is option 'C'. Can you explain this answer?
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