It has 7 i would show a picture but i cant
Answer:
I am not quite sure about it, i think it is because of the fact that mercury has weight, when it is filled with mercury, it will expand a little bit.
Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and sperm are haploid, which means they each contain one set of chromosomes; upon fertilization, they will combine their genetic material to form a zygote that is diploid, having two sets of chromosomes.
Hope this helped