Question

Ploidy level of nucellus, endosperm, polar nuclei, Megaspore mother cell, female gametophyte respectively are

• A. 2n, 3n, n, 2n, n
• B. 2n, 3n, 2n, n, n
• C. n, 2n, n, 2n, n
• D. 2n, 3n, 2n, 2n, n

Answer 1

The correct option is A 2n, 3n, n, 2n, n

Nucellus is the central part of ovule and it is diploid 2n. Polar nuclei os present in the embryo and is haploid, two polar nuclei (n+n) and a male gamete (n) fuse to form endosperm which is triploid (3n). Megaspore mother cell is the precursor of the female gametophyte. MMC is 2n and undergoes meiosis to form haploid (n) female gametophyte.