Answer :

In humans, gametes are always haploid, 2 haploid gametes fuse during fertilisation to form a diploid zygote.
Haploid means half the chromosomes (23 in humans), and this is always the case as meiosis only takes half the chromosomes for each gamete, unlike mitosis which creates a genetically identical cell each time (the process that occurs for other cells in your body).

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