Question

Number of spindle apparatus formed during

the formation of one hundred microspores

from microspore mother cells is

1) 25

2) 75

3) 50

4) 100​

Answer 1

Answer:

50

Explanation:

for 1 microspore mother cell 2 spindle apparatus is formed during div ..

so for 100 microspore 25 mmc were required

25×2=50

Answer 2

Answer:75

Explanation: Microspore mother cell undergoes meiosis to produce microspores or pollen grains. 1 Microspore mother cell undergo 1 meiosis and produce 4 pollen grains. To produce 100 microspores -

100÷4=25 meiosis divisions required.

Totally in meiosis 3 spindle fibres are formed ( 1 in meiosis-I and 2 in meiosis I|). So 1 meiosis 3 spindle then for 25 meiosis 25×3=75.