how do we know dna is is the genetic material?

Question

what experiments etc were made to show dna is really our genetic material please answer in as much detail as possiable :D

Answer 1

there r many experiments thth conform this reality

check the griffth xperiment
, hershy and chase experiment ,
avery,mc leod xperiment

Answer 2

DNA is a very long chain that is coiled up into a set of very large (relatively) clumps called chromosomes. These chromosomes are big enough that they can be seen under a microscope, even though they are technically each one big molecule. When cells divide, these chromosomes can be seen making a copy of themselves, and one copy of each going to each new cell.

The fact that these molecules contain information that is unique to every organism can be verified through a process called DNA sequencing, which was the source of information for the human genome project. We can test and repeat our theory that proteins are indirectly produced from information stored in DNA by making sequences that we predict will instruct a cell to make a particular protein (called genes), then injecting short loops of that DNA (called plasmids) into bacteria. When we do this, the bacteria 'learn' to make proteins that they couldn't make before. Resistance to certain antibiotics is often also put on the same plasmid, so that then we can expose the vat of bacteria to that antibiotic, and only the bacteria with the new plasma will survive.

While there is still a lot we don't know about the human genome, we have identified particular genes (active sequences of DNA) that cause particular traits in humans. For example, people with an abnormal BRCA1 gene are more likely to develop cancer, because their bodies are not as adept at repairing genetic damage.

Answer 3

The Hershey-Chase experiment was a series of experiments conducted in 1952 by Alfred Hershey and Martha Chase that identified DNA to be the genetic material of phages and, ultimately, of all organisms. Before this experiment was conducted, it was said that proteins were the genetic material in viruses, not DNA. A phage is a small virus that infects bacteria. It consists of a protein coat that encloses the genetic material. When a phage infects a bacterium, it inserts its genetic material into the bacterium, while its coat remains outside.

In a first experiment, T2 phages with radioactive 32P-labeled DNA infected bacteria. In a second experiment, T2 phages with radioactive 35S-labeled protein infected bacteria. In both experiments, bacteria were separated from the phage coats by blending followed by centrifugation. In the first experiment, most radioactivity was found in the infected bacteria, while in the second experiment most radioactivity was found in the phage coat. These experiments demonstrated that DNA is the genetic material of phage and that protein does not transmit genetic information.

Hershey shared the 1969 Nobel Prize in Physiology or Medicine for his “discoveries concerning the genetic structure of viruses”

Answer 4

Refer genetics by strickberger

Answer 5

well, each single one of your cells have dna in it. and dna is required to create new cells through a serie of processes for each type of cell.