A molecule that can act as a genetic material must fulfill the traits given below, except:
it should be able to express itself in the form of 'Mendelian characters'
it should be able to generate its replica
it should be unstable structurally and chemically
it should provide the scope for slow changes that are required for evolution
a primary criterion for genetic material is that it should be chemically and structurally stable so that it does not change with different stages of the life cycle, age, or change in physiology of the organism. The other options (replication, scope for mutation/evolution, and expression as Mendelian characters) are explicitly listed as required traits.
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