Question

Which structure fuses to form a diploid zygote during sexual reproduction?

Answer 1

the male and female gametes

Step-by-step explanation:

they do this during sexual reproduction in order to form a zygote.

Answer 2

Its the top one

Step-by-step explanation:

In the gills of the mushroom cap, haploid nuclei fuse to form a zygote with 2 copies of each chromosome or a diploid cell. Meiosis occurs in the cells of the mushroom cap and produce haploid spores which complete the lifecycle.