(And some phenotypes are determined by more than one gene) (The luck of Mendel’s discovery: a simple trait)
Figure 1-2 The inheritance of flower color in the snapdragon (金鱼草).
Chapter 2: Nucleic Acids convey genetic information
The stories/efforts led to the fundamental knowledge of life, which open a new era of modern biology.
By the 1930s, geneticists began speculating as to what sort of molecules could have the kind of stability that the gene demanded, yet be capable of permanent, sudden change to the mutant forms that must provide the basis of evolution... It was generally assumed that genes would be composed of amino acids because, at that time, they appeared to be the only biomolecules with sufficient complexity to convey genetic information. This hypothesis is eventually dead from its shaking base and attractive complexity.
