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Question
Out of linear tetrad which one is the functional megaspore
Out of linear tetrad which one is the functional megaspore
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Solution
The correct option is D Chalazal
Megaspore mother cell undergoes meiosis to form four haploid megaspores which are arranged in a linear tetrad. Out of these four megaspores, only one remains functional that develops into embryo sac or the female gametophyte and the rest three degenerate. The megaspore that remains functional can either be micropylar or chalazal depending upon the species. For example, in Polygonum, chalazal megaspore is functional while in Oenothera, micropylar megaspore is functional. Since Polygonum type embryo sac is the most common type of embryo sac found in Angiosperms, the functional Megaspore is generally the chalazal one. So, the correct answer is C.
Megaspore mother cell undergoes meiosis to form four haploid megaspores which are arranged in a linear tetrad. Out of these four megaspores, only one remains functional that develops into embryo sac or the female gametophyte and the rest three degenerate. The megaspore that remains functional can either be micropylar or chalazal depending upon the species. For example, in Polygonum, chalazal megaspore is functional while in Oenothera, micropylar megaspore is functional. Since Polygonum type embryo sac is the most common type of embryo sac found in Angiosperms, the functional Megaspore is generally the chalazal one.
So, the correct answer is C.
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