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Which of the following is NOT true? Pachytene is

a. longest lived stage of prophase-I

b. recombination occurs at this stage

c. the synaptonemal complexes begin to form

d. recombination nodules begin to occur

( a ) a and b only
( b ) c
( c ) c and d
( d ) b,c,d

1 Answer

In pachytene, bivalent chromosomes appear as tetrads. This stage is characterised by the appearance of the recombination nodules, the sites at which crossing over occurs between the non sister chromatids of the homologus chromosomes. Recombination due to the end of the pachytene leaving the chromosomes linked at the sites of the cross over.
answered Dec 27, 2016 by suganyadevi.p
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