Genetic damage to cone cells, which causes colour blindness, is the most commontype of gene disorder seen in humans.
锥体细胞的遗传缺陷导致了色盲,这是人类最常见的一种基因疾病。
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Only five children born in the U.S. annually have the same type of LCA as Morehouse, but focusing on a rare single-gene defect is a good way to develop a model for treating more common ailments.