Final answer:
After fertilization, the zygote remains in the fallopian tube for about 72 hours (3 days) before continuing to the uterus, making option c. 3 days the correct answer.
Step-by-step explanation:
The question pertains to the timeline of events following fertilization, specifically relating to the journey of the zygote to the uterus. After the ovum is fertilized by a sperm, it completes meiosis II and is then known as a zygote. The zygote remains in the fallopian tube for about 72 hours, during which it divides and develops rapidly before continuing its journey to the uterus. When it reaches the uterus, up to five days after fertilization, it consists of a ball of cells called a blastocyst. Shortly thereafter, within a day or two, the blastocyst implants itself into the endometrium, initiating the next stage of pregnancy.
Therefore, the answer to the question "Following fertilization, a zygote begins the journey to the well-prepared uterus, arriving about ___ after ovulation" is c. 3 days.