Watson and crick first built a triple helix model of DNA. In this model, the nitrogenous pieces for on the outside of the Daynam
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Non disjuntion occurs during prophase 2 in meiosis 2. one pair of sister chromatids don not separate from each other. As a result three cell have normal haploid chromosomes but one cell have extra chromosome while other have one less chromosome. It lead to the phenomenon of non dis junction.
Non disjuntion occurs during prophase 2 in meiosis 2. one pair of sister chromatids don not separate from each other. As a result three cell have normal haploid chromosomes but one cell have extra chromosome while other have one less chromosome. It lead to the phenomenon of non dis junction.