Question

At the time of entering into ovule, pollen tube has_________.

• A. three male nuclei
• B. two male nuclei
• C. one gamete nucleus
• D. four male gametes

Answer 1

The correct option is B

two male nuclei

At the time of entering into ovule, pollen tube has two male nuclei. In the embryo sac, one of the male nucleus fuses with the nucleus of the egg and forms a diploid zygote. This process is known as true fertilization or syngamy. The other male gamete or nucleus enters further into the embryo sac and it fuses with secondary nucleus. This gives rise to a triploid nucleus called the primary endosperm nucleus.