Question

The fusion of secondary nucleus with the second male gamete is triple fusion and the resultant nucleus is triploid or 3 $n$. This is the .................

• A. First nucleus of the endosperm
• B. First nucleus of the nucellus
• C. First nucleus of the embryo
• D. All of the above

Answer 1

The correct option is A First nucleus of the endosperm

Formation of triploid endosperm is a characteristic feature of angiosperms which undergo double fertilization. In this case the two male gametes which enter the embryo sac will fuse with egg cell as well as the secondary polar nuclei. The fusion of egg and male gamete makes the embryo. But the fusion of polar secondary nuclei with the male gamete forms the triploid endosperm.