Types of Embryo Sac

Types of Embryo Sac....

Monosporic Embryo Sac :-

Embryo Sac Developed From One functional Megaspore Nuclei

Bi-sporic Embryo Sac :-

Embryo Sac Developed From two functional Megaspore Nuclei

Tetrasporic Embryo Sac :-

In Which Megaspore Mother Cell divide By meiosis & form 4 Haploid Daughter Nuclei & wall Formation Absent Between All four Nuclei Participate Equally in formation , So equivalent to 4 megaspore Called Tetrasporic
Acc. To P.Maheshwari In 1950 , tetrasporic Embryo sac is of 7 Type :-
- Adoxa
- Pepromea
- Plumbegella
- Fritillaria (Very Important)
- Drusa
- Penea
- Plumbago

Allium & Fritillaria Type (tetraspore) :- 

in Which Megaspore mother Cell divide By meiosis