Question

How many meiosis are required to produce 10 seeds of cyprus?

Answer 1

Answer:

No. of meiotic divisions to produce x pollen grains and eggs. For producing x number of seeds (or say zygote) x number of egg cells must fuse with x number of male gametes. In angiosperms, 1 meiotic division of Megaspore mother cell leads to formation of one egg cell.

Answer 2

Answer:

20

Explanation:

since 10 seeds require formation of 10 eggs+ 10 male gametes. in Cyprus 1 meiosis--> 1 egg

and 1 meiosis---> 1 pollen grain

since there are 2 male gametes in pollen grain but only 1 is used in fertilisation and other used up in triple fusion we require 10 meiosis for egg and 10 meiosis for 10 male gametes that fertilise the egg hence 20