18. The diagram below shows spermatogenesis (on the left) a…
18. The diagram below shows spermatogenesis (on the left) and oogenesis (on the right) followed by a fertilization event. The numbered circles are cells. The long purple bars in the cells are X chromosomes while the short blue bars in the cells are Y chromosomes. Cell #8 is the zygote resulting from fertilization. a. Where has the non-disjunction occurred? Use the number to the upper left of the cell to help you explain the location of the non-disjunction. b. What non-disjunction syndrome does this illustration demonstrate? How do you know?