Which of the Following Best Describes the Ploidy Level of a Fertilized

Question

Which of the following best describes the ploidy level of a fertilized embryo sac?
A)All cells are diploid.
B)All cells are triploid.
C)All cells are polyploid.
D)The ploidy level varies among species.
E)There are haploid, diploid, and triploid cells.

Accepted Answer

In a fertilized embryo sac, there are haploid (n), diploid (2n), and triploid (3n) cells. The egg cell (haploid) fuses with a sperm cell (haploid) to form the zygote (diploid). The central cell, which is diploid, fuses with another sperm cell to form the endosperm, which is triploid.