Fact 1: Most genes contain the instructions for a single protein. Fact 2: Genes are arranged in gene clusters. Given the two facts above, how often does a thing arranged in clusters contain instructions for a single protein?
Available choices: [i] PDAs. [ii] alleles. [iii] pollen. [iv] mostly. [v] Dilution. [vi] electron. [vii] three. [viii] Flowers.
[iv]