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Question : An individual homozgous for genes cd is crossed with wild type and F_(1) is crossed back with the double recessive. The appearance of the offspring is a follows: {:(++""-""903),(cd""-""897),(+d""-""98),(c+""-""102):} The distance between genes c and d is

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20 MAP units
9.8 map units
10.2 map units
10 map units

Answer :D


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