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===Examples===
: Most Labradors have bad hips because they are all descended from a small number of dogs. They don't have enough [[biodiversity]] to inherit better hips.
: There are so few [[panda]]s pandas left in China there is very little [[biodiversity]]. That means if one of them has a genetic condition that makes them unhealthy, this condition will be passed on to most of the [[panda]]s pandas in the next few generations, making it even harder for them to survive.
==Key Stage 4==