Question

Polyembryony due to division of pro-embryo or zygote is called

• A. cleavage polyembryony
• B. general polyembryony
• C. abnormal polyembryony
• D. adventive polyembryony

Answer 1

The correct option is A cleavage polyembryony

The development of more than one embryo in an ovule, seed or fertilized ovum (egg) is called polyembryony. Polyembryony is a general feature of gymnosperms but also it is found only in a few genera of angiosperms. Polyembryony may develop due to cleavage of the proembryo, development of embryo from other cells of the embryo sac simultaneously with that of the egg cell, development of more than one embryo sac in an ovule,
Cleavage polyembryony is a type of polyembryony where cleavage of the zygote or pro-embryo occurs forming more than one embryo in a seed.
Development of polyembryony from any diploid cells of the ovule such as nucellus or integuments situated outside the embryo sac is adventive polyembryony.