Zeev's Turnips Talk Politics (ZTTP)

[tlc]

A zygote
(Greek: ζυγωτόν) is a cell
that is the result of fertilization.
That is, two haploid cells—usually
(but not always) an ovum from a female
and a sperm cell from a male—merge
into a single diploid cell called
the zygote (or zygocyte).

Animal zygotes
undergo mitotic cell divisions
to become an embryo.
Other organisms may undergo
meiotic cell division at this time