Question

If a male angiosperm plant is diploid and its female plant is tetraploid, the ploidy level of the endosperm will be

• A. tetraploid
• B. pentaploid
• C. haploid
• D. triploid

Answer 1

The correct option is B pentaploid

If the female plant is tetraploid, then the central cell of the embryo sac, which is a fused polar nuclei, will also be tetraploid. Since the male angiosperm is diploid, hence the male gamete is haploid.
Fusion of the tetraploid central cell to the haploid male gamete forms a pentaploid endosperm.