When a sperm and an ovum come together, the resulting daughter cell is called a zygote diploid 2n cell.
A zygote is a diploid 2n cell formed by fecundation of an ovule with sperm, which are germinal gametic cells generated by meiosis.
In human development, the zygote cell divides to produce first an embryo which develops into a fetus, which continues its development until birth.
The zygote diploid cell is the first cell that is divided many times by mitosis in order to generate a multicellular organism.
In conclusion, when a sperm and an ovum come together, the resulting daughter cell is called a zygote diploid 2n cell.
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