Question
Biology Question on sexual reproduction in flowering plants
In a dithecous anther, each pollen sac contain 1000 MMC. What is the total number of pollen-grains produced by the anther ?
A
4000
B
8000
C
16 ,000
D
32000
Answer
16 ,000
Explanation
Solution
Total pollen sacs or microsporangia in bilobed dithecous anther =4
Each pollen sac has 100 microspore mother cells.
So total microspore mother cell in 4 pollen sacs=4X100=400
Meiosis produces 4 pollen grains or male gametophytes.
Meiosis in 400 microspore mother cell will produce=400X4=1600 pollen grains or male gametophytes.