explain megasporogenesis with help of flow chart
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The formation of megaspores inside the ovules of seed plants. A diploid
cell in the ovule, called a megasporocyte or a megaspore mother cell,
undergoes meiosis and gives rise to four haploid megaspores. In most
plants, only one of the megaspores then goes on to develop into a
megagametophyte within the ovule, while the other three disintegrate. In
the ovules of angiosperms, megasporogenesis takes place within a
structure called a nucellus, and it is the megaspore farthest from the
micropyle of the ovary that survives.
The formation of megaspores inside the ovules of seed plants. A diploid
cell in the ovule, called a megasporocyte or a megaspore mother cell,
undergoes meiosis and gives rise to four haploid megaspores. In most
plants, only one of the megaspores then goes on to develop into a
megagametophyte within the ovule, while the other three disintegrate. In
the ovules of angiosperms, megasporogenesis takes place within a
structure called a nucellus, and it is the megaspore farthest from the
micropyle of the ovary that survives.
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Megasporogenesis with the help of flow chart is as following :-
Mega spore are the the larger of the two kinds of sporescharacteristically produced by seed plants and a few fern allies, developing into a female gametophyte.
1.Megaspore mother cell- Meiosis- Linear tetrad of megaspore- 3 degenerate (Monosporic)- One functional megaspore- 3 times free nuclear divisions- Rearrangement of nuclei- 3 at micropylar end, 3 at chalazal end and 2 in the center- Cytokinesis.
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