Question

The following individuals are found:

a) mosaic with 12% of body cells having an extra chromosome 21

b) mosaic with 75% of body cells having an extra chromosome 21

c) non-mosaic with 100% of body cells having an extra chromosome 21

Match the individuals above with the statements below:

Individual ___'s genotype is most likely a result of nondisjunction in mitosis of early fetal development because:

Individuals ___'s genotype is most likely a result of nondisjunction during meiosis because:

Individuals ___'s genotype is most likely a result of nondisjunction in mitosis of late fetal development because:

Answer 1

Please note mosaic down syndrome means that some of the cell have extra 21 chromosome but down syndrome means all cells have an extra copy of 21 chromosomes. Now following, this definition,

a. Mosaic with 12 percent of body cell having an extra chromosome 21 is genotype is most likely a result of non disjunction in mitosis of late fetal development .

b. Mosaic with 75 percent of body cell having an extra chromosome 21 is genotype is most likely a result of non disjunction in mitosis of early development.

c. Non mosaic with 100 percent of body cell having extra chromosome is individuals genotype is most likely a non disjunction during meiosis .