You look up the word zygote and find:

• zygote: a cell formed by the union of two gametes...and
• gametes: a mature male or female germ cell usually possessing a haploid chromosome set and capable of initiating formation of a new diploid individual by fusion with a gamete of the opposite sex...and
• diploid: a single cell, individual, or generation characterized by the diploid chromosome number...and
• haploid: having the gametic number of chromosomes or half the number characteristic of somatic cells...and
• Forget what you wanted to know for anyway....