Final answer:
When two haploid cells with complementary mating-type alleles conjugate, a diploid zygote is formed, which can undergo meiosis and produce haploid daughter cells.
Step-by-step explanation:
When two haploid cells with DNA containing complementary mating-type alleles conjugate, a diploid zygote is formed. The diploid zygote can then complete the sexual segment of the life cycle through meiosis, resulting in the formation of four haploid daughter cells. Therefore, the answer to the question is 1) Diploid.