Here's how to determine the chromosome number in a plant's root epidermal cells:

* Egg cells are haploid: This means they have half the number of chromosomes found in a normal body cell (somatic cell).

* Root epidermal cells are diploid: These are normal body cells and contain the full complement of chromosomes.

Therefore:

* Since the egg cell has 14 chromosomes (haploid), the normal root epidermal cell would have 28 chromosomes (diploid).