Final answer:
The correct name for a fertilized egg, right after conception is a zygote.
Step-by-step explanation:
The correct answer is 1) zygote
After fertilization, the egg and sperm combine to form a fertilized egg, which is called a zygote. The zygote is the first stage of development in human reproduction and contains the complete set of chromosomes, half from the egg and half from the sperm.