The concepts accepted by the scientific community before Watson and Crick's discovery include chromosomes are found in the nucleus, genes are located on chromosomes and chromosomes are made up of protein and nucleic acid (Options a, b and c).
The major Watson and Crick's discovery is associated with the unraveling of the double helix structure of the DNA molecule, which required a series of previous observations such as the presence of chromosomes.
Therefore, with this data, we can see that the major Watson and Crick's discovery is based on the presence of chromosomes and its genetic content.
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