Biological Concept & Calculation

Diploid Number ($2n$):

A typical angiosperm body cell is diploid.

Given in the question:

$$2n = 36$$

Haploid Number ($n$):

Find the base chromosome number (haploid genome) by dividing the diploid number by 2:

$$n = \frac{36}{2} = 18$$

Endosperm Ploidy ($3n$):

In typical angiosperms, the endosperm is formed via triple fusion (the fusion of one haploid male gamete with two haploid polar nuclei). This means the endosperm tissue is triploid ($3n$):

$$\text{Endosperm chromosome number} = 3n$$

$$3 \times 18 = 54$$

Correct Option

Option 2 (54)