We have separated the alleles and put them into different cells. However the job is incomplete as it stands. After all, separating a set of alleles from each other does not preclude any association of the alleles on one chromosome with the alleles on a different chromosome. In fact, meiosis demands such a mixing.
(Refer to the end products of meiosis. One member of each chromosome pair was in the final haploid
product.) Since no mechanism exists to direct the final arrangement of the different chromatids, it must be assumed that any chromatid from any given bivalent should be able to associate with any given chromatid of a different bivalent. Thus the chromatid containing a & B could associate with either C & d or c & d. Click on the ACTIVATE button to display the associations of the a & B chromatid.