Q.The haploid number of chromosome for an Angiosperm is 14, the number of chromosome in its endosperm would be

Step 1. Recall the defining feature of angiosperm reproduction: double fertilization. One male nucleus fuses with the egg (n + n = 2n zygote); a second male nucleus fuses with the two polar nuclei in the central cell (n + n + n = 3n), forming the primary endosperm nucleus.

Step 2. The endosperm that develops from this triple fusion is therefore always triploid (3n) in angiosperms — this is one of the sharpest distinctions from gymnosperms, whose endosperm is haploid.

Step 3. Given the haploid number n = 14 for this angiosperm, the endosperm's chromosome number is 3n = 3 × 14 = 42.

Apply the triploid-endosperm rule (3n) that follows from angiosperm double fertilization.

• Answering 28 (2n, the zygote's/embryo's chromosome number) instead of the endosperm's 3n.
• Answering 14 (n) by forgetting the endosperm is triploid, not haploid — that rule applies to gymnosperms, not angiosperms.