Question

If the diploid number of a flowering plant is 36, what would be the chromosome number in its endosperm?

• A. 18
• B. 36
• C. 54
• D. 72

Answer 1

The correct option is C 54

Given data:

In angiosperms, double fertilisation takes place where, one male gamete fuses with the egg cell to form a diploid zygote and the other haploid male gamete fuses with the two haploid polar nuclei to form a triploid $\left(3n\right)$ endosperm. $36$ is the diploid chromosome number.
$\Rightarrow 2n=36$

Calculation of haploid chromosome number (n):
$2n=36$
$\Rightarrow n=\frac{36}{2}$
Therefore, $n=18$

Calculation of triploid chromosome number:
$3\times 18=54$

Final answer:

$c.54$