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  1. The formation of multivalents at meiosis in a diploid organism is due to
    1. inversion
    2. deletion
    3. monosomy
    4. reciprocal translocation
Correct Option: D

Inversion is a change in chromosomal architecture in which part of the chromosome gets inverted in its position so that the sequence of the genes in the inverted region is reversed. In deletion a segment of a chromosome breaks and is lost. Monosomy is a type of deletion involving deficiency of one chromosome (2n - 1). In reciprocal translocation there is a mutual exchange of segments between two non homologous chromosomes.



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