Final answer:
The nonfunctional cellular products of oogenesis are called A. polar bodies. These are small cells that contain excess chromosomes and a minimal amount of cytoplasm, and they generally degrade after formation.
Step-by-step explanation:
The nonfunctional cellular products of oogenesis are called polar bodies. Oogenesis is the process by which the female gametes, or ova, are produced. During this process, a primary oocyte divides unequally to form a secondary oocyte and a small cell known as a polar body. The polar body contains a nucleus and a small amount of cytoplasm and usually degrades. This occurs because most of the cytoplasm and cellular organelles are reserved for the secondary oocyte, which has the potential to become fertilized and lead to the development of a zygote. The Zygote forms only if the secondary oocyte completes meiosis after fertilization. If fertilized, the secondary oocyte undergoes the second division of meiosis, produces a second polar body, and becomes a haploid ovum which then merges with the sperm to form the zygote.
A polar body's function is thus to allow the oocyte to discard the extra set of chromosomes and ensure that the resulting ovum has the correct number of chromosomes (haploid) for fertilization. The other possible answers (B. Zygotes, C. Blastocysts, and D. Ootids) represent different stages of development post-fertilization or cellular forms in the process of oogenesis. Therefore, the correct answer to this question is A. Polar bodies.