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

  1. A
    A unit of distance between two expressed genes representing 10% cross over.
  2. B
    A unit of distance between two expressed genes representing 100% cross over.
  3. C
    A unit of distance between genes on chromosomes, representing 1% cross over.
  4. D
    A unit of distance between genes on chromosomes, representing 50% cross over.

Solution & Step-by-step Explanation

Alfred Sturtevant used the frequency of recombination between gene pairs as a measure of the distance between genes. 1 map unit (or 1 centimorgan) is defined as a recombination frequency (cross over frequency) of 1%.

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What map unit (Centimorgan) is adopted in the construction of genetic maps?
A
A unit of distance between two expressed genes representing 10% cross over.
B
A unit of distance between two expressed genes representing 100% cross over.
C
A unit of distance between genes on chromosomes, representing 1% cross over.
D
A unit of distance between genes on chromosomes, representing 50% cross over.

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