Question
Question: Three copies of chromosome – 21 in child with Down’s syndrome have been formed analysed using molecu...
Three copies of chromosome – 21 in child with Down’s syndrome have been formed analysed using molecular biology technology to detect any possible DNA po9lymorphism with reference to different alleles located on chromosome – 21. Results showed that out of 3copies 2 of the chromosomes of the child contain the same alleles as one of the mother’s alleles. based on this when did the non- disjunction event most likely occur.
A
Paternal meiosis – I
B
Maternal meiosis – I
C
Paternal meiosis – II
D
Maternal Meiosis – II
Answer
Maternal Meiosis – II