Question #cb36e

1 Answer
Dr Birendra Kumar Mishra
Nov 28, 2016

Crossing over compulsorily occurs in meiosis.

Explanation:

  1. The crossing over is the characteristic feature of meiosis. In the pachytene sub-phase meiosis I, the homologous chromosomes form a complex crossing-over.
  2. During the crossind over, the genes are recombined, which is raw the material for variationas.
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