It's hard to pick a starting point on where to begin in explaining our disdain for gender-reveal parties, but the name itself seems like a good one, in the fact that it's a complete misnomer. You are not revealing the gender of your baby; you are revealing the sex.
DNA Polymerase is a polymerase that synthesizes a DNA strand ... so it's used in DNA replication. RNA Polymerase is not used to form the primer-that is primases job. RNA Pol is used during transcription to synthesize the mRNA strand. EK does a decent job describing a primer.
Quick Answer. DNA polymerases is the enzyme that catalyzes DNA synthesis, but it is different from RNA polymerases. This particular type of polymerases have specific conditions and requirements that must be met for them to be produced. Without these enzymes, the nucleotides that are the building blocks of DNA cannot be made.