What evidence is there to support that adenine, thymine, guanine, and cytosine carries hereditary instructions

Answer 1

They all code for codons which are made of 3 of the bases. Codons only appear in RNA and code for specific amino acids which in turn produce a protein which serves some purpose within a living organism.

Answer 2

They don't, they are grouped into codons of three and tell the ribosome which amino acid to make and the proteins made by this function as needed in the cell. There isn't a magic "blue eyes" recipe hiding somewhere in adenine, its just that more or less of a few proteins cause blue eyes or more muscle mass etc.

Answer 3

They don't carry hereditary instructions, they CODE for the instructions. It is the gene that bears the instructions and the instructions are written in 'letters' of A,G,T,C.

If you want to know the evidence underpinning the gene-bearing-hereditary-info theory, i will suggest mutation and deliberate alterations of base pairs [AGTC]. Studies and experiments have shown that the removal or tampering of the existing DNA sequence of organisms will lead to expressions of faulty genes. For example, if a part of the gene which controls the position of the eye [the Hox gene, or homogenic box] is tampered with, the eyes will be wrongly placed on other parts of the body.

Answer 4

If you want the classic pioneering experiments Google Oswald Avery, and Hershey and Chase