Question

discuss the development of female gametophyte in angiosperms

Answer 1

Dear Student
In the development of female gametophyte the megaspore is the first cell. The lowermost megaspore enlarges and produces an embryo sac. The lowermost megaspore then divides to give rise to 8-nucleate embryo sac. Out of these eight nuclei, the 3-nuclei towards the micropyle form egg apparatus containing middle egg cell and on its either side, and two synergies. The other three nuclei towards the chalazal end of the embryo sac are called antipodal. Two nuclei present at the center of the embryo sac fuse together forming secondary nucleus or definite nucleus.
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