Take the gene mutation that causes phenylketonuria, or PKU. People with the disease can't break down the amino acid phenylalanine, a problem that can lead to severe cognitive damage.

提取能导致苯丙酮尿症（PKU）的基因突变.患这种病的人不能分解氨基酸苯丙氨酸，这会导致严重的认知损坏。

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Genetic damage to cone cells, which causes colour blindness, is the most common type 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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Normally zebrafish, which carry the same p53 gene as humans, can survive low doses of radiation, which causes damage to the DNA, because the gene steps in to repair that damage.

在通常情况下，像人类一样携带相同p 53基因的斑马鱼可以承受小剂量的放射，放射会对DNA造成损坏，而基因会加入对损坏的修复。

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They found that a mouse with a defect on the phospholamban gene also suffered severe damage to its heart.

BBC: Gene link to inherited heart disease

Using drugs and gene technology, the researchers have developed ways to prevent both the death of the cells and the subsequent tissue damage.

BBC: Minimising cancer care damage