A zygote is a diploid, as it contains two sets of chromosomes.
The formation of a zygote occurs because of the fusion of male and female gametes, which are haploid.
In a diploid organism (2n), a male (n) and female gamete (n) is formed because of meiosis (reduction division), containing only one set of chromosomes.
On the fusion of male and female gamete (fertilization), a diploid zygote is formed, which is a fertilized egg. Thus, the original number of chromosomes gets restored.
Male gamete (n) x Female gamete (n) = zygote (2n).
Final Answer
Hence, Zygote is diploid