Q156 / 180 · NEET 2019 (All India) · Zoology

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.
  • Correct answer
    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.

Solution

1 map unit or centimorgan is equivalent to 1% recombination between two genes. If was Sturtevant who first suggest that frequency of recombination can be used to depict relative distance between the genes. 10% crossing over is known as Morgan (M)

Hence, the correct answer is option: 'C'.

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