Question

how many pollen grains and ovules would be formed by anter and ovules in an angiosperm bearing 25 microspore mother cell and 25 megaspore mother cell respectively ?

Answer 1

A single megaspore mother cell after meiosis produces 4 megaspores. Each megaspore develops into an embryo containing a single ovule. Thus 25 megaspore mother cells will produce 25 * 4 = 100 megaspores. This means 100 ovules will be produced from 25 megaspore mother cells.

Microspore mother cells also undergo meiosis and produce 4 microspores. The microspore transforms into a pollen grain. 25 microspore mother cells will produce total 25 * 4 = 100 microspores. Thus 100 pollen grains will be produced from 25 microspore mother cells.