Complex sentence: The haploid gametes produced by (most) diploid organisms are monoploid, and these can combine to form a diploid zygote, for example most animals are diploid and produce monoploid gametes.
Split into simpler sentences: The haploid gametes produced by (most) diploid organisms are monoploid, and these can combine to form a diploid zygote. For example most animals are diploid and produce monoploid gametes.