When two genes are situated very close to each other in a chromosome

  • [AIIMS 1980]
  • A

    The percentage of crossing over between them is very high

  • B

    Hardly any cross over are detected

  • C

    No crossing over can take place between them

  • D

    Only double cross overs can take place between them

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The recombination frequency between the genes $a\, \& \, c$ is $5 \,\% \,, b\, \& \,c$ is $15 \,\%,\, b\, \& \,d$ is $9 \%, \,a\, \& \,b$ is $20 \%$ , $c\, \& \,d$ is $24 \%$ and $a \, \& \,d$ is $29 \%$. What will be the sequence of these genes on a linear chromosome? 

  • [NEET 2022]

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  • [NEET 2015]