SSC MTS EXAM

Detailed explanation-1: -During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.

Detailed explanation-2: -During meiosis I, the random orientation of the maternal and paternal chromosomes can lead to variation. The exchange of genetic information between homologous chromosomes also induces variation. The random orientation of sister chromatids in meiosis II also generates genetic variation.