What is indicated by the suffix "o/o" in terms of reproductive biology?

The suffix "o/o" is derived from the Greek word "oón," meaning "egg." In reproductive biology, this prefix is commonly associated with female reproductive cells or ova. It signifies the ovum's role in fertilization and development, thus highlighting its importance in the reproductive process.

The other terms—sperm, embryo, and chromosome—are related to different aspects of reproduction but do not utilize the "o/o" suffix. Sperm refers to the male reproductive cell, while an embryo is the developing organism post-fertilization. Chromosomes are structures within cells that carry genetic information. Therefore, the emphasis on "o/o" specifically connects to the ovum as the female gamete, making it the correct choice in this context.