Can you explain why DNA must be replicated before mitosis and the role of helicase in DNA replication

1. dna needs to be replicated before mitosis so that the parent cell has the same amount of genetic material as the parent cell once it has split.

2. helicase is an enzyme that is so dna can unwind.

Explanation:

the explanation is in the answer.

I hope this helps!

DNA must be replicated before mitosis so that both identical daughter cells contain the same amount of genetic material as the parent cell once it has split in two. Helicase is an enzyme necessary at the initiation of DNA replication to unwind/unzip the DNA so that this process may begin.

this would be a math

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.