NEET 2019 Biology question

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

(1)A unit of distance between two expressed genes representing 10% cross over.
(2)A unit of distance between two expressed genes representing 100% cross over.
(3)A unit of distance between genes on chromosomes, representing 1% cross over.Correct
(4)A unit of distance between genes on chromosomes, representing 50% cross over.

Answer: (3)

Solution

Alfred Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes and mapped their position. One map unit

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Question ID VK-092503