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It is not recommended to put a rat and mouse together unless done so from a very very young age.

Female Mice and Rats can store sperm,and therefore give birth at a later date without presence of a male.

A rat has more chromosomes then a mouse. There are also protective layers over the animals egg that protects it from being fertilized by another species.

A rat and a mouse will not cross breed.

Read the link attached below for more information.

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14y ago

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