The cell formed by the union of the ovum and sperm is called a zygote. A zygote is the initial single cell that contains genetic material from both parents after fertilization. It eventually develops into an embryo and later a fetus. ;
The cell formed by the union of the ovum and sperm is called a zygote. A zygote represents the initial stage of development after fertilization, leading to the formation of an embryo and eventually a fetus. This choice is validated by the definitions of the developmental stages in biology.
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