Finish the diagram from p. 205 (sea urchin fertilization and early development). Be sure the diagram is labelled:
A – fertilization: sperm meets egg; sperm nucleus enters egg.
B – zygote – diploid cell that results from fertilization
C – 1st mitotic division – 2 cells
D – 2nd mitotic division – 4 cells
E – 3rd mitotic division – 8 cells
Be sure you have finished and handed in the meiosis diagram (see p. 191), labelled. This was assigned earlier and has been collected.