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Which of the pairing is not feasible?(a) Pairing between homologous chromosomes(b) Pairing between homologous parts of non-homologous chromosome(c) Pairing between 4 chromosomes following translocation(d) Pairing between more than 2 chromosomesThis question was posed to me in exam.My doubt stems from Meiosis Prophase 1 : Zygotene in chapter Chromosomal Changes During Meiosis of Cytogenetics

Answer»

Right CHOICE is (d) Pairing between more than 2 chromosomes

The best I can EXPLAIN: Translocation may result in the chromosome that is partially HOMOLOGOUS to two DIFFERENT chromosomes, this result in pairing of 4 chromosomes. Also homologous segments in non-homologous chromosomes can par. But pairing with more than 2 chromosomes in a normal instance is not seen.



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