Exchange of genetic material between chromatids of homologous chromosomes during meiosis is called

  • [AIPMT 1996]
  • A

    Synapsis

  • B

    Chiasmata

  • C

    Transformation

  • D

    Crossing over

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The linkage map of $X$-chromosome of fruit fly has $66$ units with yellow body gene $(y)$ at one end and bobbed hair $(b)$ gene at the other end. The recombination frequency between these two genes ($y$ and $b$) should be

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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

Which one of the following pair is correctly matched

The experiment shown in the given figure has been carried out by Morgan to show the phenomenon of linkage and recombination. If in cross $I$, genes are tightly linked and in cross $II$, genes are loosely linked then what will be the percentage of recombinants produced in cross $I$ and cross $II$ respectively?

  • [AIIMS 2016]

Crossing over in diploid organism is responsible for

  • [AIPMT 1998]