24. This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it. O A. Alzheimer B....

This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it.


Extracted text: 24. This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it. O A. Alzheimer B. Parkinson's Trisomy O c. Down Syndrome O D. Leukemia 25. Crossing over involves each of the following with the EXCEPTION of O A. Transfer of DNA segments between homologous chromosomes B. Formation of synaptonemal complex C. Alignment of homologous chromosomes O D. None, all are involved in crossing over OE. Formation of chiasmata O o o o O