Record Type configuration and Mapping

I have a record type named Patient and in that there are columns like Name ,Age and Gender. I need to store the value in Gender as M and F. There is another recordtype named reference and there I have 2 columns such as gender code and gender name .There are 2 records ,one is gender code M for gender name Male and second is gender code F for the gender name female .When I am displaying the record list I need to show the gender values as Male and Female instead of M and F by mapping to the recordtype reference . Please tell me how to configure this .

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