Question

the cell formed by the union of a sperm and egg is called a, and it is (haploid/diploid).

Explanation:

When a sperm (haploid, \(n\)) and an egg (haploid, \(n\)) fuse during fertilization, the resulting cell is called a zygote. The process of fertilization combines the genetic material from both gametes. Since each gamete has a haploid (\(n\)) set of chromosomes, the zygote has a diploid (\(2n\)) set of chromosomes (\(n + n=2n\)).

Answer:

zygote; diploid