Crossing over crossing over plays a critical role in increasing the genetic variation among offspring of sexual reproduction. it
is important to understand how crossing over occurs and its consequences in meiosis. look carefully at the diagrams depicting different stages in meiosis in a cell where 2n = 6. assume that the red chromosomes are of maternal origin and the blue chromosomes are of paternal origin.
the nitrogenous bases form hydrogen bonds between opposing DNA strands to form the rungs of the Twisted ladder or double helix of DNA or biological catalysts that is found in the nucleotides.
