Question

Endosperm is a triploid tissue in angiosperms because of

• A. Fusion of second male gamete with secondary nucleus
• B. Double fertilization
• C. Both of the above
• D. Formation of endosperm before fertilization

Answer 1

The correct option is C Both of the above

Endosperm is a triploid tissue in angiosperms, because double fertilization results in the formation of a diploid zygote and a triploid endosperm. The female gametophyte or embryo sac has an egg nucleus and two polar nuclei. One sperm fertilizes the egg nucleus and forms the zygote, 2n. Another sperm joins the two polar nuclei forming the triploid (3n) nutritive tissue, called as the endosperm.