Sexual Reproduction in Flowering Plants · Question 121

Endosperm is formed during the double fertilization by

1. two polar nuclei and one male gamete
2. one polar nucleus and one male gamete
3. ovum and male gamete
4. two polar nuclei and two male gametes

Answer

(1) two polar nuclei and one male gamete

Solution

As per NCERT, one male gamete fuses with the egg (syngamy) to form the zygote.

⇒ The other male gamete fuses with the two polar nuclei in the central cell to produce a triploid primary endosperm nucleus (PEN); this is triple fusion.

∴ The primary endosperm cell develops into the endosperm.

Answer: (1)