What happens during the unwinding stage?

Unwinding enzymes called DNA helicases cause the two parent DNA strands to unwind and separate from one another in both directions at this site to form two Y-shaped replication forks. These replication forks are the actual site of DNA copying. got it from google

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;