Discuss the relationship between genetic distance and physical distance between two linked genes. What will be an ideal response?
ANSWER: Distances on genetic maps are measured in map units (centimorgans) and on physical maps,
distances are measured in base pairs.
The units of distance on a genetic map are expressed as a percentage of crossing over, where
1 map unit is equal to a 1% crossover frequency. Therefore, genetic maps only give an
indication of the relative distance between two linked genes.
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