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Q.

What map unit (centi Morgan) is adopted in the construction of genetic maps?

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a

A unit of distance between genes on chromosomes, representing 50% cross over

b

A unit of distance between two expressed genes representing 10% cross over

c

A unit of distance between genes on chromosomes, representing 1% cross over

d

A unit of distance between two expressed genes representing 100% cross over

answer is B.

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Detailed Solution

In the construction of genetic maps, map unit or centi Morgan is a unit or distance between genes on chromosomes, representing 1% cross over, 
i.e. 1 map unit - 1% cross over. Hence, the genetic distance between genes is based on average number of cross over frequency between them.

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What map unit (centi Morgan) is adopted in the construction of genetic maps?