Question : Three copies of chromosome -21 in a chield with Down's syndrome have been formed analysed using molecular biology technology to detect any possible DNA polymorphism with reference to different alleles located on chromosome -21. Results showed that out of 3 copies2 of the chromosomes of the child contain the same alleles as one of the mother'salleles. Based on thiswhen did the non-disjunction event most likely occur.

Question : Three copies of chromosome -21 in a chield with Down's synd

1.	Question : Three copies of chromosome -21 in a chield with Down's syndrome have been formed analysed using molecular biology technology to detect any possible DNA polymorphism with reference to different alleles located on chromosome -21. Results showed that out of 3 copies2 of the chromosomes of the child contain the same alleles as one of the mother'salleles. Based on thiswhen did the non-disjunction event most likely occur.
Answer» PATERNAL meiosis-I Meternal meiosis-I Paternal meiosis-II Maternal meiosis-II ANSWER :d