What were the proposed models for replication of DNA?

Answer 1

3 different models were proposed that described DNA replication:
1) conservative model
-- according to this hypothesis, both strands of parental DNA remain together following DNA replication. In this model, the original arrangement of parental strands is completely conserved, while the 2 newly made daughter strands are also together following replication.

2) semi conservative model
-- the double- stranded DNA is half- conserved following the replication process. In other words, the double-stranded DNA contains one parental strand and one daughter strand.

3) dispersive model
-- proposed that segments of parental DNA are interspersed in both strands following the replication process.

However, only the SEMI-CONSERVATIVE model is correct.

Actually these situations are best shown using diagrams.

This is proven by Matthew and Franklin Stahl experiment in 1958 which used different isotope of nitrogen(14&15) to label the DNA.

Answer 2

Semiconservative replication describes the method by which DNA is replicated in all known cells. This method of replication was one of three proposed models of DNA replication:

Conservative replication would leave the two original template DNA strands together in a double helix and would produce a copy composed of two new strands containing all of the new DNA base pairs.
Dispersive replication would produce two copies of the DNA, both containing distinct regions of DNA composed of either both original strands or both new strands.
Semiconservative replication would produce two copies that each contained one of the original strands and one entirely new strand.

Answer 3

semicoservative in which its made of one old strand and a strand from new nucleotides. this is how it replicates in real life.

conservative in which two original strands are kept together and another double helix is formed from new nucleotides.

dispersive in which a double helix contains two strands each made from old and new nucleotides