Which explanation best describes the outcome of this fertilization? A Monosomy has occurred, resulting in an offspring with one copy of chromosome 21 instead of two. Nondisjunction occurred during the
formation of the egg.
B. Trisomy has occurred, resulting in the offspring with three coples of chromosome 21 Instead of two. Nondisjunction occurred during the
formation of the egg.
C. Monosomy has occurred, resulting in an offspring with three copies of chromosome 21 Instead of two. Crossing over occurred during the
formation of the sperm.
D. Trisomy has occurred, resulting in an offspring with one copy of chromosome 21 instead of two. Crossing over occurred during the formation of
the sperm.