The map distance between genes $A$ and $B$ is $3$ units, between $B$ and $C$ $10$ units and between $C$ and $A$ $7$ units. The order of the genes in a linkage map constructed on the above data would perhaps be

  • A

    $A, B, C$

  • B

    $A, C, B$

  • C

    $B, C, A$

  • D

    $B, A, C$

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The theory of recombination of linked gene due to crossing over of chromosome during zygotene of meiosis was put forwarded by

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$(b)$ Both genes did not segregate independently of each other

$(c)$ Recombinant types are not obtained in $F_{2}$ generation

$(d)$ Both genes segregate independently of each other

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