Though we often think of genes in terms of the phenotypes they produce (e.g., curly leaves, flaky

Question:

Though we often think of genes in terms of the phenotypes they produce (e.g., curly leaves, flaky tail, brown eyes), the molecular function of most genes is to encode proteins. Many cellular proteins function as enzymes. The following table gives the map distances separating pairs of genes for six different genes that encode six different enzymes: Ada, adenosine deaminase; Hao-1, hydroxyacid oxidase-1; Hdc, histidine decarboxylase; Odc-2, ornithine decarboxylase-2; Sdh-1, sorbitol dehydrogenase-1; and Ass-1, arginosuccinate synthetase-1.

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