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Significance of Meiosis

It is defined...

Question

It is defined as the process of formation of haploid microspores from diploid Microspore Mother Cell (MMC) inside pollen sac by meiotic division.Give reasons?

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Solution

The microspore mother cell is diploid in nature. It undergoes two successive meiotic divisions to result in the formation of the microspore tetrad. Meiosis halves the number of chromosomes. Hence, the four microspores formed are haploid in nature. This process of development of haploid microspores from diploid microspore mother cell is known as microsporogenesis.

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Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

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Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

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Significance of Meiosis

Standard XII Biology

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