why 4th is incorrect
Q.19. All are the essential stages that take place during meiosis, except
(1) Two successive divisions without any DNA replication occuring between them
(2) Formation of chiasmata and crossing over
(3) Segregation of homologous chromosomes
(4) Number of chromosomes in daughter cells after meiosis II is reduced to half but the amount of DNA remains the same
 

Because meiosis || is equational division,so here chromosome number is not reduced to half

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